How to prepare your PC for the Windows 10 upgrade

It's been a long ride, but at the end of July, millions of users around the world will finally get their hands on Windows 10. In this new release, Microsoft is going back to the drawing board to make Windows better. The company is doing this by bringing back many of the familiarities of Windows 7 with a mix of Windows 8.1 functionality, brand new features, such as Cortana, Settings, and universal Windows apps, and changing the way people upgrade to the next operating system. So far things are looking very good.

Below you will find everything you need to know to prepare your computer to upgrade to Windows 10. From making sure all your system's components are compatible with the new operating system, to preparing a recovery plan, to making the necessary changes to prevent possible hiccups during the process.

Making sure Windows 10 is compatible with your PC

One of the efforts to put Windows 10 on a billion devices is by making the operating system free for the first year after the release, for everyone running a genuine version of Windows 7 Service Pack 1 (opens in new tab) and Windows 8.1 Update (opens in new tab). Recently an important update (KB3035583) (opens in new tab) has rolled out adding the "Get Windows 10" app on qualifying PCs to allow users to reserve their free copy of Windows 10.

However, the app offers more than just a way to reserve a copy of the operating system; it also includes a tool to check your PC to see if it's compatible with Windows 10. While almost every computer running Windows 7 or Windows 8 will be compatible, the app is very handy to detect if certain applications or hardware currently installed on your computer will work after the upgrade.

If you already see the Start button icon in the notification area (bottom-right corner), click it to launch the "Get Windows 10" app. From the top-left, click the hamburger button, and then from the menu, click Check your PC. If everything is good, you'll see a green message saying "This PC meets the system requirements", and you can now safely click the Reserve button to complete the reservation.

If there is an issue, you will see it listed under Devices and Apps. For more information about the what the report covers, check this support page from Microsoft (opens in new tab).

While most hardware and software should work without a problem, typical compatibility issues could include wireless and Bluetooth adapters, outdated drivers, and very old applications.

If you find something that isn't compatible, it doesn't necessarily mean that you cannot install Windows 10. But, you should halt the reservation, go to your PC manufacturer's support website and see if there are any updates or drivers available for that particular product.

Even though Windows can detect and install most device drivers, it's a good idea to always update to the latest and just to have them handy in case you need to reinstall any of them after the upgrade. (Trust me, you don't want a network adapter problem after the upgrade and without a network connection to find a solution.)

Here is a list of the most common PC manufacturer websites support to download drivers and software:

  • Lenovo (opens in new tab)
  • Dell (opens in new tab)
  • Acer (opens in new tab)
  • HP (opens in new tab)
  • ASUS
  • Toshiba
  • Samsung (opens in new tab)

In the case you're dealing with an old application, see if there is an update available or decide if it's time to upgrade. If the app ends up being not compatible, but you want to use Windows 10, you can also opt to create a virtual machine running Windows 7 (keep in mind that a license may be required) to run the app. To do this, you can use free tools such as VirtualBox or Microsoft's Hyper-V (available on Windows 10 Pro).

You can always find more detailed information about Windows 10 compatibility for a particular application or hardware at the Windows Compatibility Center (opens in new tab), but remember that the database is currently small, so results are limited.

There could be the case where you'll see the notification that you won't be able to restore factory settings. If you get this message, it means that the manufacturer has set up your PC to run from a compressed Windows image and included an option to restore factory settings. After the upgrade, you will not be able to restore to the original factory settings, but there will be other recovery options.

If you don't see the "Get Windows 10" app, chances are that one of following cases is true:

  • Your PC doesn't have installed update KB3035583
  • Your PC is having an issue with update KB3035583. Try uninstalling and reinstalling the update again.
  • Your PC is not running Windows 7 Service Pack 1 or Windows 8.1 Update
  • Your PC is not compatible with Windows 10
  • Your PC is not running a genuine version of Windows

Note: Microsoft will offer Windows 10 as a free upgrade, which means that you'll have to install the new version on top of Windows 7 or Windows 8.1 in order to have a fully activated installation, but the company will also allow users to upgrade doing a clean install of the operating system. However, users will be forced to do the upgrade via Windows Update first, then being allowed to perform a clean install of Windows 10.

Now that you know your PC is ready, it's time to make sure you don't lose any settings, files, and you have a bulletproof recovery option.

The next step is to make a full backup of your system

I cannot stress this enough, but before even considering pressing the upgrade button, you have to understand that software could always fail and if something bad happens, you could lose many important files. To prevent such a nightmare, you need a recovery plan, but luckily, both Windows 7 and Windows 8.1 come with a System image backup tool.

The System image backup can be found in the Control Panel and it's a tool that will help you to create a bit-by-bit copy of your entire system's hard drive, including operating system, settings, programs, and files.

You can check out our previous guide on how to create a full backup. The instructions applies for Windows 7, Windows 8.x, and Windows 10.

Once you have the backup created, you can move to the next step.

Knowing your Windows product key

Another step I personally like to do before modifying an installation of Windows is to make sure I have the product key of my current install. The product key could come in handy if for some reason the installation gets corrupted and I have to start from scratch by installing the previous version of Windows again. Or sometimes it could even happen that the setup process could ask you for the product key during the upgrade, even though it shouldn't. Also, you'll need the product key if you are planning to perform a clean installation of Windows 10.

Now, chances are that you probably have the product key on the original box that came with a copy of the operating system, or it's printed out on a label attached to your computer, or you have this information sent to you via email after you purchased Windows. However, if you don't have this information, you'll have to resort to specific tools that can allow you to pull the product key from the current installation.

One of the tools that can help you with this task is Enchanted Keyfinder tool. This is a free tool (use it at your own risk) that is easy to download and use. There is not installation required, just extract the files and run.

Once you open the app, you can easily save all the information on a text file for later use. If you're using OneDrive, you can save it there and this file will then be accessible from your phone or a secondary computer.

Keep in mind the minimum requirements to install Windows 10

While most machines running Windows 7 and Windows 8.1 are likely to run Windows 10 flawlessly, Microsoft has a minimum spec requirement to install the new operating system:

  • Processor: 1 gigahertz (GHz) or faster processor or SoC
  • RAM: 1 gigabyte (GB) for 32-bit or 2 GB for 64-bit
  • Hard disk space: 16 GB for 32-bit OS 20 GB for 64-bit OS
  • Graphics Card: DirectX 9 or later with WDDM 1.0 driver
  • Display: 1024x600

Disabling unnecessary security software during the upgrade

While your computer should never be without security protection, sometimes antivirus, spyware, and other security software may be the common causes for an unsuccessful installation of an operating system. During the installation process try to disable any antivirus, firewall, and other security software you may have installed in your computer. Even better, many times it is recommended to uninstall this type of software and then reinstall again after the upgrade.

For example, to disable Microsoft's free antivirus, open Control Panel, click Windows Defender, then navigate to the Settings tab, uncheck the Turn on real-time protection (recommended), and click Save changes.

And to disable Windows Firewall, open Control Panel, click Windows Firewall, from the left pane click Turn Windows Firewall on or off, and turn off the firewall on "Private network settings" and "Public network settings".

In other cases, some programs that start in the background also be the cause of an unsuccessful installation. To prevent this, disable and/or uninstall any application that starts at boot during the upgrade process. In addition, before beginning with the installation process, close all running applications as this could also issues during the installation.

Making space for the upgrade

Although your computer is likely to have enough space to perform the upgrade, you're required to have at least 5GB free. If you don't have enough disk space available, you can make more space by moving files, such as Documents, Videos, Pictures, and Music, to an alternate location.

You can also uninstall programs that you don't need or rarely use. In addition, you can run the Windows Disk Cleanup tool to delete unnecessary files like Temporary Internet Files, Debug Dump Files, Recycle Bin, Temporary Files, System error memory dump files, old updates, and pretty much any else in the list.

The cleanup task is straightforward:

1- Open File Explorer and navigate to This PC

2- Right-click the Windows drive (typically the C:/ drive), and click on Properties

3- Then click the Disk Cleanup button and after you're shown the results, click the Clean up system files button

4- From the list check all files you want to delete, click OK, and Delete Files

If that isn't enough to free up disk space, the Windows 10 installation process allows you to connect an external drive that the setup can use for temporary storage, but again it has to have at least 5GB of free space. Then, after the upgrade process completes, you can disconnect the drive.

Disconnect unnecessary peripherals

Another factor that can prevent a successful installation are peripherals connected to the computer. These devices could interrupt the installation because Windows 10 is trying to install them, but they are either not compatible or the latest drivers are not available at the time of installation.

Before beginning with the upgrade process, disconnect all the peripherals that are not necessary, you'll probably be OK by having connected only a mouse, keyboard, and monitor.

Windows 10, Windows Insiders, and Windows 10 Preview

There has been some miscommunication between Microsoft and Windows Insiders, but now the information is clear how the upgrade process will work with insiders, so you can be prepare.

If you installed any of the Windows 10 Previews on a computer running Windows 7 or Windows 8.1 as an upgrade, you'll be able to upgrade to the final release of Windows 10 and the operating system will stay fully activated.

If you've performed a clean installation of Windows 10 Preview, you'll have to roll back to your previous version, before upgrading to the final version of Windows 10 and have the operating system fully activated.

If you have performed a clean installation using Windows 10 Preview and you don't have an eligible version of Windows to upgrade for free, you can upgrade to Windows 10 RTM, but it will be just another pre-release build. It will be activated with a pre-release product key and it will expire after a certain amount of time, so as long you signed in with your Microsoft Account, you can continue to get new builds. Basically, while you can use Windows 10 for free, the Windows Insider program is not a path to obtain a product key of the operating system.

For those still wondering, you can find out which version of Windows 10 you will get when you upgrade for free here.

Wrapping things up

While the upgrade process should be as easy as pressing a single upgrade button, you can see that there are a number of steps you have to make sure you follow to prepare your PC for a new operating system and minimize any issues.

Windows 10 is set to launch on July 29, 2015, and those who reserve a free copy will begin receiving the bits via Windows Update, so make sure to also check that Windows Update is enabled in Control Panel.

Finally, remember that you'll also need a Microsoft Account if you want to take full advantage of the new operating system and be able to install apps from the Windows Store.

How are you preparing for Windows 10? If you have extra tips, let us know in the comments below.

Happy Windows 10 upgrade!

More Resources

Remember that we have many other articles on Windows 10, if you need help you always check these other resources:

Mauro Huculak

Mauro Huculak is technical writer for His primary focus is to write comprehensive how-tos to help users get the most out of Windows 10 and its many related technologies. He has an IT background with professional certifications from Microsoft, Cisco, and CompTIA, and he's a recognized member of the Microsoft MVP community.

  • As expected HP support sucks, no Windows 10 drivers, not even Windows 8 or 8.1 drivers. Way to screw your customers HP.
  • Most Windows 7 drivers will do the job just fine.
  • Most probably yes, but not the GPU driver, been there done that, when Win8 first came out; also contacted HP support on numerous occasions and even used the write to CEO page and it got me nowhere sadly. It is rather dissapointing that you pay a lot of money for a high end laptop yet still don't get any driver support, if you check the drivers page I linked the last drivers were released in 2011, and I bought the laptop in late fall 2011, so no new drivers since I bought it, even though the hardware is perfectly capable of running Win10 if new drivers were provided.
  • I completely agree, what GPU is it though? If it's Intel based I've found that bypassing HP, Lenovo etc. and using the Intel driver update utility reveals much newer drivers.
  • It's a combination of AMD HD 6770M/Intel gpu. So for switchable graphics to work you need the HP driver.
  • Do you need both though? If you could chose one which would you pick? I'd pick the AMD one if they had a newer driver which they're bound to.
  • You probably can get one of them running with the new drivers, but Not ideal to have AMD running whole time as I don't want my fan on when I am not playing gamers or doing other intensive tasks. Bottom line is, HP needs to release drivers for this ASAP, or the bad reputation they are building up is just going to grow and if they don't change I hope they fail miserably. We all saw what happened to Sony and their VAIO line, and that was also due to shit support Sony provided, I can speak to that personally. Haven't bought a single Sony product since they screwed me with support on the VAIO AR I had, and never will buy any Sony products ever again.
  • No, I have an HP notebook, too and because the latest GPU driver on their support site is released in July 2014 (for Windows 8.1), I installed manually the latest AMD driver from AMD's site which is released in Dec 2014 and it works fine. Yes, it's still old, but what can we do, that's the latest. It switches between the two GPUs normally. "you can't get anything but the HP drivers to work properly on the Intel/AMD HD 6770M" oh then sorry. I have an AMD HD 8670M btw.
  • I also lost all willingness to buy amything from SONY. HP as well. You're in good company. Don't forget to Vote for Carly!  
  • You do need both; these laptops were designed with hybrid graphics and can switch back and forth as needed.  But HP NEVER updates these; my DV7 has a very buggy combo driver set that predates the release of said laptop.  When I asked, HP asked me to contact Intel and AMD, neither of whom took that seriously.  
  • Video drivers you should always get from the hardware manufacturer website, as in NVIDIA, AMD or Intel. They'll have the most up to date working drivers for your system. If you've been doing that, disregard my message, otherwise -- hope it helps!
  • But majority of HP products come with a custom GPU which have different driver which are not listed on GPU vendors website. Only way is to get via HP :(
  • The only brands of laptop/tablet that that applies to are OEMs like dell, eurocomm, apple because they use mxm instead of the other style thats not easily removable
  • You can't do that for HP laptops with Intel/AMD switchable graphics, as you will break the whole gpu functionality if you use generic drivers from AMD or Intel website.
  • Actually, John20212 you can. You have to enable switch graphics manually in catalyst. It's a pain but it works. So if your going to be running graphic intensive tasks such as games switch to high performance (power plan) and enable the and card using the right click context menu (switch graphics manually). I have a hp laptop with a i5-2450m with a 7470m. Also I wouldn't recommend using the beta driver from AMD yet on Windows 10 TP, that has always hosed the complete install for me (you may have better luck).
  • Last time I checked, when Win 8.1 came out, looking over forum posts and support threads from others that have tried it, you can't get anything but the HP drivers to work properly on the Intel/AMD HD 6770M combo; you have a newer card so perhaps they changed how it works with generic AMD drivers, I don't know, but I am not going to waste countless hours of my time researching it again as I did when Win8 came out and again with Win8.1 without any success. If other drivers work, HP needs to update their support pages or release new drivers themselves, people should not be forced to troubleshoot this mess HP created by refusing to provide new drivers themselves.
  • Yeah thats typical
  • You got your computer in 2011 I think they don't provide driver update after 3 years unless user complain about issue and if HP thinks it's a major issue that need to be dealt with.
  • I don't know your situation, at least for me, I have a Vaio VPCCW15FL with an old Centrino 2 chipset. It was a monster with Windows 7, but, they never released any driver for Windows 8/8.1 so I had to survive with no Bluetooth and some BSOD when the GPU driver crashed. Trying to update from NVidia resulted in "your manufacturer should provide the drivers for your GPU". Hopelessly I performed a clean install of Windows 10TP and the thing went worse: Watching youtube videos in fullscreen was a pain in the ass because the GPU stopped working and you no longer were able to use the device. Amazingly I looked for Nvidia drivers one final time and They worked!!!! they even updated the entire audio/video chipset, now I have an old Centrino 2 laptop running as fast as it can. Bluetooth still dead (I haven't checked for updates yet).
  • at least you dont have a Pegatron laptop
  • What do you mean? My HP laptop which came with 8.1 shows it is eligible for the free Windows 10 upgrade.
  • He must be talking about windows 7 not windows 8. In other words he wants to upgrade from windows 7 to windows 10 but HP doesn't provides any drivers for his windows 7 PC.
  • What WengWeng_21 said. Still under the Microsoft free upgrade I could upgrade to Win10 for free, in theory, the problem is with no new drivers from HP I would be screwed especially when it comes to swichable graphics. Same reason I was not able to upgrade to Win8 or 8.1.
  • Try the video card manufacturer. I used the Nvidia driver for a dual vid Fujitsu laptop without issue. They never even updated past there initial build!
  • That might work for Nvidia, but this laptop has Intel/AMD HD 6770M gpu combo, and if you use the generic AMD drivers it breaks the ability to switch between the Intel gpu and the AMD gpu. Even AMD tells you to get the drivers from HP, as HP has customized them to work on their hardware. Problem is HP has decided to abandon releasing new drivers beyond the ones shipped with the laptop.
  • That card got renamed to HD 7690M XT, which in turn have been used in newer HP laptops. Chances are that they also work with your dual graphics. No W10 drivers yet, but at least W8. It's worth a shot. Another way to go is to look for other laptop brands using both Intel and AMD, even newer models as graphics drivers usually work for more than one generation.
  • Thanks for the driver suggestion, might look into it when I get more time, but the issue might be that the driver package for the HD 7690M XT might refure to install because it can't detect the correct card, even if the hardware is the same, the designation is not.
  • Who knows, but your card is listed inside, check Packages\Drivers\Display\W86A_INF\C8146512.inf Line 1838. This is very common, the drivers are out there, the question is how to find it.
  • If the new drivers work, and as you said it is very likely if the card is listed in the inf files, then I don't get why HP does not update their support pages with new drivers. For a laptop that cost me $1500+ I would expect a lot better support then this. Without new drivers any PC just becomes a paper weight after a few years, even if the hardware is still good.
  • HP doesn't sell that model anymore so they don't care. It sucks, but other hardware manufactures are just as bad. I have upgraded a lot of old PCs from XP/Vista to 7/8 and there is usually zero driver support. However I search for the hardware string and can usually find the driver I'm looking for eventually. 
  • My hp laptop also wasn't showing get Windows 10 notification for a long time...i updated and tried every way I could find on the internet to get the notification... Finally I got the notification today without any new updates...i don't get what the problem is with hp laptops
  • I got the Microsoft notification weeks ago, thats not the problem. The problem is when you check HP's support page they only have old 2011 Windows 7 drivers available; those drivers are not even the newest ones for Windows 7, not to mention Win8 or Win10. Maybe with enough publicity of this problem with many HP laptops, HP will realize that it's not worth the bad rep to continue to not release drivers for all their laptops with hardware that supports Windows 10. Microsoft should also try to exert some pressume on their OEM's if they want everyone to use Windows 10 as soon as possible.  
  • I just boht a HP envy 17 laptop. I hope I don't run into the same issues later on. I wish I had looked it up and found about the issues you got, definitely would have gone with a different brand.
  • Wish you all the best, only time will tell if HP continues this strategy of no driver support, hopefully you won't run into such issue, but if you do shout as loud as you can about it so others don't fall into the same trap by HP again.
  • Well that is expected to loose support in couple of years time, but still I have a 7 year old intel/amd combo laptop, expectedly no drivers, came with vista, now perfectly runs win 10 with no issues, yes depending on your configuartion, might not work properly, but my experience with Hp laptops has been great. Now own another envy touchsmart( bought 2013), drivers are still avaiable.
  • What I am pissed off about is that HP did not even provide drive support for a couple of years, since I bought the laptop in late 2011 they did not release a single driver update, not a single one. Windows 8 came out just 1 year after I bought the laptop and HP did not even bother to provide drivers for that even though the laptop was still in warranty. Never again an HP laptop, unless by a miracle HP decides to release Win10 drivers for all the laptops they have abandoned since Win7. But pigs will fly before that happens.  
  • This is a every vendor problem. All the manufactures dont update drivers for any new OS as 99+ percent of the systems do not upgrade to the newest OS. If they lose a couple people here or there is not an issue based on this. Maybe with Windows 10 it will change since MS is offering it to everyone, but who knows. Also all drivers from Vista Up will work with 10. Some better than others and pretty much all of them you will have to dig into them to find the specific driver rather than use the installer. I am using a HP laptop from the early Vista days and they never releasd 64 bit drivers for it even though it a 64 bit system. The driver installers would not find a correct card, but doing it manually it worked like a charm.  
  • Even I havent received yet Windows 8.1 compatible drivers. They say my PC drivers are not compatible with the 8.1 update. Even tried contacting support still no help.
  • I'm with you on this! HP driver support sucks! I have a DV6-6075la notebook (AMD Phenom II X2 N660 with 3.0 GHz, 4 GB of RAM, and dual AMD switchable graphics more than capable to handle Windows 7, 8.1 and 10) and I bought it full price from HP a year before Windows 8 was released. I was so pissed that they didn't release an updated driver for my switchable graphics since 2011 when I wanted to update to Windows 8 so I stayed on 7. Tried the first builds of Win 10 (dual-booting) and couldn't make the graphics work with the "latest" drivers or the generic ones. Then, I tried some builds later and it worked changing the compatibility settings to Windows 7 for all users. Worked fine. Some builds later, it didn't work again. Then I found that if you install the HP Software Framework, it seems to work better (the last time I didn't even need to change compatibility settings for the installer). I highly discourage anyone who asks me for recommendations to buy a HP product since then. They should update drivers for essential components more frequently and actively because these laptops (at least mine) are not cheap and are marketed as high ends by them. I will update to Windows 10 though. I'm tired of Windows 7 by now.
  • If you didn't get HP to upgrade from 7 to 8 or 8.1 I doubt you wil be able to upgrade to 10. My advice would be to increase the RAM of your PC, install Microsoft Virtual PC and install Windows 10 in a virtualized environment to test the graphics drivers.
  • I have plenty of ram, and I have windows 10 running in wmware player, but that uses its own gpu drivers that are not really affected by the swichable graphics. Never really tried Microsoft Virtual PC. At this point I stopped trying to get it to work after the countless hours I wasted when Win8 & 8.1 first came out, so unless HP releases new drivers, I will just wait until this laptop dies and when I get a new one I will make sure it's not HP ever again.
  • This has been a well-documented issue on the Insider forums and as of 10130 AMD has released a beta driver through Windows Update that works. I had the same problem on my Envy 14.
  • Then why buy HP?  I've known since 2004 that HP is a garbage brand and I will NEVER buy a product from that company. If I buy anything I buy ASUS or Lenovo. I can't do HP. Every single HP product I've owned has had severe problems. My Pavilion desktops had PSU or HDD issues, my laptops had motherboard or bios issues, etc. JUNK brand.   
  • If I have known they would not release new drivers I would have never boght the HP laptop and went with different brand. I know better now for sure. No Driver support = no buy. I also had some hardware issues, but at least on that front HP was a lot better than Sony with hardware replacements, still does not excuse the lack of driver updates though.
  • My HP has no issues, I run AMD A10 5670 + 7670m
  • Also had issues when upgrading my HP to windows 8 (Intel i7 2670qm + AMD 6770m). At first the AMD card would not work at all. Installed drivers from AMD which worked to an extent. Dynamic switchable graphics did not work, however manually adjusting in Catalyst allowed me to switch over. Recently a windows update auto installed and dynamic switchable graphics started working perfectly. Couldn't be bothered to figure out why or how this happened.
  • You might want to try drivers from Leshcat, i had to search for thirdparty drivers when I upgraded to W8 on my lenovo thinkpad edge, since lenovo didnt provide drivers for w8, drivers worked great
  • YUP! i agree with you. I never got the reserve copy on my all in one HP thats only 2yrs old smh
  • Lenovo too has poor driver support
  • I know, horrible.  I bought essentially the same HP laptop as you, plus an HP desktop at the same time.  Both were unreliable, made even worse by a lack of driver and bios updates, poor support, a locked bios, and hardware whitelisting.  If anything goes wrong the whole machine is junk.  And upgrades?  Forget it.  I bought them almost exactly one year before Windows 8 came out, but neither was ever able to be upgraded.  The biggest issue wasn't drivers, it was their "non-standard" (aka buggy) UEFI implementation, which ironically they marketed as making their machines ready for future technologies. Both the laptop and the desktop had their graphics cards go bad right after the one year warranty ran out.  In the case of the laptop this was fatal.  Someone asked "do you need both [the integrated and discrete graphics card]?"  Yes, you do, because they lock down the bios so you can't set it to use just one or the other.  HP wanted to charge $700 (!) to fix it, and no one but HP could do it.  I ended up throwing out a thousand dollar laptop 13 months after purchase.  I still have the desktop, but only because I was able to track down the exact make and model of graphics card it came with.  The first replacement card I tried didn't work, once again thanks to a buggy UEFI and a locked bios that didn't let me use it in legacy (non-UEFI) mode. Seriously horrible support from HP.
  • I'm sure there's no need to disable Windows Firewall or Security Essentials as these are Microsoft's own, but third party programs (not apps kids) such as Kaspersky will definitely need to be disabled.
  • Yah you should disable 3rd party antivirus program. I didnt do this while updating to 8.1 update and I got some files missing but the OS worked.
  • Exactly. There's absolutely no need to disable Windows' built-in security.
  • It's dumb as hell ! Especially for the firewall protection being disabled.
  •  I dont even have third party anti virus installed.. Only Windows defender
  • Can hardly wait.
  • Sigh. One month!!! I'm so excited ^▽^
  • Windows with bing counts? My winbook doesn't have that upgrade notification.
  • I'm curious about that too. I just bought a cheap tower to record my IP cameras and it runs Windows with Bing. I can't seem to find if it will upgrade for free to Windows 10... and if so, what version.
  • Yes, Windows 8.1 with Bing is going to be updated to Windows 10 Home. From the FAQ's: Windows 83
    From Edition
    To Edition Windows Phone 8.1*
    Windows 10 Mobile Windows 8.1**
    Windows 10 Home Windows 8.1 Pro
    Windows 10 Pro Windows 8.1 Pro for Students **Also applies to Windows 8.1 country specific editions, Windows 8.1 Single Language, Windows 8.1 with Bing.
  • Well I lost my genuine windows 7 license due to hard disk failure :(
  • No, you didn't! get the OA (OEM) version install (same version as the sticker says!!) from the web (torrents even - it's ilegal to download, but the version will be totaly genuine) then do a clean install, use the serial from the sticker, and than do the activation via telephone.   I've done that many times, since i changed HDD on brand new laptops. (most recent one was yesterday) If you need help send me a PM.
  • Kklemn how do you do that? Please give me more details. I bought a new Dell with windows 8 on it but it crash hence I lost my genuine activation. Now I have to stick with the insider preview as I though it was the only way to get a genuine copy. Are you now saying that I can re activate my PC that came with windows 8 legally? Please provide more details on this as I think many of us will benefit from this.
  • If your laptop came from the OEM with windows 8 then the key is imbedded in the bios. You just need to find an installation disk somewhere to reinstall 8. First thing I would do is search for a program that reads the key from the bios. Once you have this you can actually get the ISO from Microsoft to install. You will have to enter a valid key on the webpage to be authorized to download it.  Keep in mind that you will have to upgrade to 8.1 in order to later be able to upgrade to 10. 
  • Since devices don't come with DVD drives, they come with a recovery partition, , so if you install a preview or newer version there is always a way to restore factory settings. Of course unless you deliberately removed the recovery partition, but if you did this before creating a USB recovery tool anybody would say you lost your license forever. About recovering the key from BIOS, I didn't know that was legal to do, but thanks for sharing, I really think that would be difficult for non advanced PC users.
  • His issue was a crashed harddrive so in this case he would have lost everything to include the recovery partition. Absolutely nothing "Ilegal" about reading the saved key. Now trying to go in to the bios and edit it may be a different story. To the Original poster, is a link to the windows 8 iso download direct from microsoft's website.  
  • How did you reinstall Windows 7 on your new hard drive, are you using a pirated copy? If that is true, you can still install Windows 10 but you will have to agreed to get beta OS images installed everytime they get released, since you won't be able to disable the Windows 10 upgrade. Of course, you're planning on not connecting your PC to the Internet.
  • From easy this article made to complicated xD
  • How about hp stream 7?
  • Hp stream works good, I have the most recent build installed
  • I don't received any update in my hp stream 7, to prepare my tab for windows 10 nor notify me to reserve one...
  • My Windows 8.1 pc is reserved and ready!
  • Nice article. Thanks.
    So product keys can be used for more than once? Mine it's been already used.
  • One once, unless you are paying for an enterprise volume license. I added the step to pull your product key, just as a precaution, if you needed during the install or if you need to reinstall Windows for some reason. You can never be too careful. Thanks,
  • Brilliant article..covered a number of things I didn't know had to be checked and made sure of...thank you Mauro...:)
  • Thanks, I'm glad the info can be useful!
  • technically there is no limit to how many times you can use the key as long as you are using it on the same machine you originally activated on. OEM. When you activate windows it scans the computer for hardware and creates a hardware ID and when you try to reactivate it matches the present hardware ID with what was previously recorded. If this ID is different but is still the same machine you will need to phone to activate. 
  • I did a clean install but I reactivated it with my windows 8.1 pro key and it worked. Do you think I will still need to re-upgrade from 8.1?
  • Nope
  • That would be nice. Windows 10 TP is my main OS now and I have a lot of programs I wont want to reinstall.
  • The new Samsung ultrabook has the Core-M processor that's only a base of 0.9 GHz.... Does that mean it won't be able to run Windows 10? Or is it because of the Turbo Boost that it'll run?
  • If i dnt have Graphics card on my lappy, can i install?
  • Yes, you will be able to.
  • What a comment, I lol'd
  • I'm getting error 0x80072EFD when i'm manually running "refreshgwxconfig" in task manager. Why?
  • But, rather than upgrading i prefer buying Windows 10 Pro Original... with Office 2016 ProPlus & Visual Studio 2016
  • I read that they are giving free Windows 10 to insider program people?
  • the finalised builds will be available only to those with genuine windows. if you dont have the licence, you'll be able to continue as a windows insider (frequent updates will be mandatory) if i understood correctly.
  • The Jelly Bean Key Finder can't find my Windows and Office key, only the last five letter shows up. Belarc Advisor works better.
  • Hey guys
    Do u all think its a good idea to install windows 10 64bit in my PC which has 2GB of ram? Or install the 32 bit version? I am gonna do a clean install.
  • Personally I would always go with 64bit. 3 gigs of ram is all you will get on a 32 bit system and with 2 or less you are really hampering what your system can do. If for instance you are running both an antivirus and outlook you are peaking physical ram and starting to thrash he hard drive. I would never build and deploy a system today with less then 4 gigs of ram in it. With the 64 bit version it is always easier to add ram at a later date. 
  • I only see the get Windows10 icon on Windows 8.1 not on Windows 7 SP1, does Microsoft only issue one Get Windows10 app icon between two authentic versions of Windows ? Can I download the full version of Windows10 on the side, as well as the upgrade ?
  • You should get it for both of them. If you don't see it then either the 7 pc is joined to a domain or there is some compatibility issue that has not been rectified yet. Things are updating constantly on the gwx front so it may come eventually. OR you can wait for the 29th and download it manually through windows update. The whole reason behind GWX's existence is to predownload and take stress off of microsofts update servers come launch. 
  • does suck.. I always had trouble getting drivers for my HP laptops while performing clean install. While installing windows 10 over windows 7 everything worked fine except for fingerprint reader..
  • AMD sucks in updating their gpu drivers properly, they don't even have a proper Windows 8.1 driver, never buy a pc with AMD graphics! Posted via the Windows Central App for Android with my Note 4.
  • I'm assuing you have a switchable AMD/Intel card? They left updates to those to OEMs who dropped the ball but they have since provided a new driver themselves via windows update in the insider preview because of complaints from insiders
  • If your going to take the time to get the license keys off your computer into a text file you need to print them out also. It's a little late if your in the middle of a install and you need them and you can't get to that text file. Especially if the first attempt fails and you can't boot into Windows like happened with one of the beta installs on Windows 10 I tried.
  • Just copy the text file to OneDrive and use your windows phone to open it up when you need to use the key. Easy. No need to print.
  • Nice tutorial as always, Mauro! Well explained!
  • I have a pirated win 8.1 and I'm getting the upgrade notification 
    It might be discoverd during the upgrade process
    so I'll wait for the pirated ISO of win 10 ;)
  • You will be able to upgrade but it would be non genuine.
  • I activated my windows 8.1 with kmspico tool from torrent site,will I receive update or they consider me genuine ?
  • You can't be serious? "KMSPico" or "Torrent". The two terms there are basically never associated with terms like legal, legit or genuine. You'll be able to get Windows 10, but it won't be genuine. Either become an Insider (and be tracked) or enjoy the non-genuine watermark.
  • Sucks to see the 8.1 requirement. I've seen many failed 8.1 Updates that are likely going to require a complete "Reset" of the WIndows 8 installation to repair. I've fixed a few with troubelshooting, others just continue to fail. I feel like this is the reason Windows 8.0 is still at 3.5% usage. Updating through the Store was a terrible idea.
  • Guys. I don't understand anything. My lap is running Windows 8.1 and I am not sure if I have my product key. I registered for my free windows 10 upgrade. Will I get to upgrade to windows 10 or not??? Please help me guys....
  • Yes. Windows 8 keys are imbedded in the bios as long as you purchased the system with it. 
  • Word of advice, Just redownload all your files from OneDrive.  I just went back to Windows 8 so I reformated my machine.  I thought I'd try and merge my old onedrive files in becasue I store them on a second hard drive.  It doesn't merge, so I duplicated a lot of music, and all of my photos.  It's not too hard to fix, but I wasted a lot of time fixing it.
  • Good think I have my pornsonal files in a separate disk :) I'll just let the upgrader do its thing n__n
  • I am currently using Micromax laptab running on windows 8.1 upgradeable to windows 10 , I am up to date on windows updates, but I am not getting the windows logo button on taskbar. Could you guys help me out with it. Thanks in advance
  • My desktop has the notification for w10, but stream 7 hasn't yet
  • Nice article published on windows central
  • I'd your PC is domain-joined you will not get the update app in the system tray. I would like to know how to overcome that.
  • Looks like domain-joined would not get the Free update. Try to get out of the domain and try again.
  • I want to wipe my computer anyway, so I'm just going to download the iso tomorrow from MSDN and install clean. My wife's will be upgraded, also from iso. So I'll get out of messing with the domain that way. ;)
  • Still don't have the reserve notification on my SP3 running build 10130. Windows Update doesn't show the "Important Update" to get the notification, so there's no way for me to get it. Well, guess I'm just gonna wait until 7/29 to install the whole OS at once :(
  • Reserves notification is for windows 7 and 8.1, not for 10 Preview
  • I have a hp pavilion g6 running Windows 7 and I am eligible.​
  • I'm already using Windows 10 TP, so what do I do..?  
  • My laptop is reserved, but it is activated with some kms activator. I wonder will it become a genuine windows 10?
  • Thanks Mauro Huculak.This article is really helpful.
  • No problem at all, thank you for your feedback.
  • I haven't reset my machine in 3 years, and I'm starting to feel how bloated everything is getting, so I'm gonna do a clean install.
  • Unless you are using a local account I don't think you'll see any performance gain on a clean install. If you use a local account, you could just upgrade from 8.1 to 10 and then create a brand new local administrator account and it will feel as a brand new account on a brand new Windows 10 installation. Just my 2 cents.
  • coming from PC with Windows 8.0 then Windows 8.1 upgrade and now Windows 10 upgrade reinstalling will be a hassle. Ok once i download Windows 10 only in Windows 8.1 and then create a Windows 8.1 system image backup. Can I use the Windows 8.1 system image backup to reinstall Windows 10 after the free offer.
  • Is it really necessary to back up if all of your files are l stored in the cloud anyway? Sorry if this is a dumb learning as I go...
  • Your files stored on the cloud is as if you stored it on an external drive - separate from the hard drive in the computer, so you're good to go.
  • Thanks for the article, I think it will be useful next month when we start updating all types of computers. I installed the preview builds on a partition on my PC, but after the final version comes out I'd like to go back to a single partition. I hope someone here can help out with instructions of how to do that.  
  • Same thing I do with every new version -- backup, format, install new version. Simply updating from another version... not so long as there is that beast called "the registry". 
  • Well this was good to know
  • I have an old Dell laptop (XPS M1330) with Windows 7 pro, Service Pack 1 on it when I bought it in 2007. The windows update KB3035583 is already on it, but I am not getting "Get Windows 10" in the notification area! Anyone else with the same issue?
  • Advising people to disable Windows Firewall is not a good idea. Please consider removing that piece of guidance.
  • Agreed, I see no point in disabling that or Windows Defender, because being native tools they won't create problems. So that particular piced of advice does more harm than the potential good it's aimed at.
  • Wher's Sony .. Windows 10 won't comin on it ??
  • Vaio doesn't belong to Sony anymore as they sold it to some Chinese company I think? But yeh I miss Sony Vaio:(
  • No. VAIO was sold to Japan Industry Partners with Sony still holding a 5% stake, it's not sold to a Chinese company. Posted via the Windows Central App for Android
  • Sony has said that they will update drivers only for computers that have shipped with Win8 and Win8.1 over the next couple of months.  They actually gave a very specific timeline but you may either need to check their website/blog/Vaio Care application to find those details.
  • OMG, all this time I have been thinking its was June 29!! lol... 
  • I noticed that Keyfinder's free version wants to install some kind of adware or something in the installer. I found that out when I tested it in a Windows 7 installation image (installed in a VM) that I bought from an online store and was not sure if it was legit or not. Short answer: It wasn't, but I had a legitimate key and install disk that I used for my Mint/Windows dual boot. Install Keyfinder at your own risk.
  • It is full of Malware, do NOT DOWNLOAD!
  • Well I hope the final version is tablet friendly, I downloaded it on my Dell Venue pro 8 and it was just awful and terrible. Tablet mode is useless, when you select it it doesn't do a thing but remove the icons from the windows bar at the bottom. All the apps categories are constantly showing on the sides and it makes the screen smaller. The worst part of it all is it renders the tablet untouched friendly. Microsoft Edge and Explorer no longer has swipe, and the tiny icon buttons are hard to press in the browsers. Needless to say I immediately uninstall Windows 10 from it. There was nothing good about it on the tablet, it takes about 3-4 seconds to load everything you touch...sometimes it doesn't even respond.
  • No update here why you uploaded this post no one is receiving updates
  • How can i get net framework 3.5.1 on windows 10???
  • pull up programs and features, right click from start button, click on "Turn Windows features on or off" on the left and .NET Framework 3.5 is the first option on the top.
  • Wonder when they will let the Windows 8.1 with bing users reserved the update
  • My Linx 10 tablet running 8.1 with Bing let me reserve it about a week ago, Hasn't started pre-downloading anything yet though... For comparison my Advent Win7 Home Premium laptop has downloaded about 3.2gb, my Acer 8.1 Pro laptop seems to be stuck at 140mb. Dell 7 Pro desktop hasn't reserved yet.
  • I have one question: On my PC I am running Windows 7 Professional, which I got over our university's MSDNAA cooperation. As far as I know, those licenses expire after one installation. Will I be able to upgrade my PC to W10, and then create an installation disk (in case I have to reinstall W10 after the upgrade)? Or will the W10 license expire then, too? Thanks in advance! :)
  • Is it only me or I messed up something, not sure. But, when I manually tried to install couple of updates needed for reserving that I didn't have here in India, it kinda screwed up my Win8.1 PC. Suddenly, all of my CPU is burning at 99% consumption, Task Manager takes ages to open. Even when load is low, I tried playing a couple of games, and after a few mins in the beginning, suddenly everything became too laggy. CS:Source which usually runs at around 80-100fps dropped to hardly 20-24fps. Anyone else see such performance issues? I also happen to be a Windows Insider so I guess thats why I didnt get the Reserve app automatically.
  • On one of my PC's, (HP all-in-one) the Get Windows 10 app is no longer checking to see if it's compatible. The only issue present before was a graphics driver I think (seems to have been discussed already in the comments) but I would like to check again to see if it's now ready - my primary Samsung all-in-one had Bluetooth issues that disappeared after a second scan (presumably due to changes on either Microsoft or Samsung's ends). EDIT: Also can't seem to get that second screenshot of the device checker any more on either device. How do you get that again? Still, great article and I'll definitely be referring to this just before the upgrade so I can use it as a checklist!
  • I have a question I reserve my place for upgrade to win 10 and get the msg saying your place is reserve can I get an ISO rtm file? I have installed win 7 ultimate sp1 on my PC .I activated it with pirate keygen called win 7 loader  Can I get the win10 geniune rtm copy Can someone help
  • Touch Screen Not Required, what does this mean? I get this on my Asus Vivo Tab Note 8, if the screen doesn't work I will not be able to type.
  • The requirement to go to Win 10 does not require a touch screen. If you have a touch screen, that's cool, but it isn't required. You're good to go. Some folks may get confused and think that they can only upgrade to Win10 if they have a computer with a touchscreen, so that message is there to let you know you don't need it. Apparently, spelling it out, there are still going to be folks that are confused.
  • exceellent article sir. too bad i still dont have the windows 10 icon on my traybar. running win 7 pro SP1  with updates set as automatic. been that way since ages anywas. saw the glimpse of the latest build and am excited 
  • I have a question. If I upgrade to Windows 10 now, from my Windows 8.1 PC, and quit the insider preview after July 29, will I keep Windows 10 forever?
  • Yes
  • @all -  can someone answer this !!
    suppose i install windows 10  when its available for my laptop !! MSFT said that its available for free upgrade upto 1 year after the os is released.
    so......if i upgrade it now !!
    & after an year or so....if i ever need to reinstall windows or format my entire hdd & i format usng a windows 8 dvd i got from dell !! will i have the option to upgrade to 10 at that time ??
    also, its going to be a problem everytime to format using windows 8 dvd & then reinstall 10. is there any way by which i can directly install windows  10 on the laptop ??
  • What is the Minimum Sytem Requirements for Windows 10 check here
  • Are the HP Stream 7 and 8 tablets upgradeable?
  • Is there a way to upgrade with a clean install ? I don't want that Windows Old Folder neither old files stored in HD
  • So I'm using SP3. It has clean Windows 8.1 in recovery. If I upgrade to Windows 10, and the recovery partition also change to Windows 10? Please answer me. By the way, you can see product ID by Rt clicking on my computer. 
  • Perhaps the article's front page information should be updated to say that it is only one more day until launch, not a full month. I know this article was originally published a month ago, but you republished it. EDIT: This is a great article! I will probably have lots of use for it when my friends have questions about how to upgrade smoothly from Windows 7 to Windows 10 (a few of them run Windows 8.1).
  • I'm not getting that kb3035583 on my laptop...tried installing it manually...but gets stuck at 'checking for updates on this computer' :(
  • I couldn't reserve my copy because the Get Windows 10 app did not show in the system tray. My desktop is up to date with the KB3035583 installed already. :_(
  • Still no "Get Windows 10 App" on my PC. All requirements are met! The Updates are all in place (even reinstalled them) My MS Account is flagged as "Windows Insider" (but never got around to tinker with insider build) My PC is custom built Windows 8.1 Pro x64 is installed and genuine!
  • So for the loyal windows 10 preview fans that have no media to go back to windows 8.1 we are stuck on the preview are you serious. Hopefully RTM allows for updating continuously in the future with no breakage
  • What do I do if I am running Windows 8 via boot camp on MacBook pro? Posted via the Windows Central App for Android on my Oneplus One
  • Suppose that are for everyone the upgrade now I think must be released an ISO image for reinstall in clean the OS an will be able of install it in the mac with,boot camp
  • I have Windows 10 Insider. can i upgade to the normal version? or do i need go back to Winows 8.1 first?
  • Will need go back to windows 8.1 for have the definitive edition of Windows, if still under preview will always get pre releases which might expire if Microsoft don't release sooner the new key and, at the end will always have to hold inconsistencies in the OS since will continuously receiving beta versions which might compromise stability, security and enjoyment in this, version of Windows
  • Thanks then i will go back 
  • Asus neither is ready with the drivers and possibilities that my old scanner don't work on windows 10 is high but would work out with the windows 8 drivers should work fine either way
  • Sharing is caring...
  • My update stuck at 5% for past couple hours.... What's the update about?? Why is it stuck?? Any help anyone ??
  • The last time In installed Windows 8.1 I forgot to set my bios to AHCI for my Samsun SSD the os is on.. I wonder if during the upgrade, during the first reboot, if I went in the bios and changed it if it would see the mode and enable it in Windows 10? Or will I be forced to upgrade out of AHCIthen enable it and do a clean install... (Probably the best solution anyway, but I'm busy with work so it'll need to wait).  
  • I can't wait!!!
  • Thank you for the post.
  • probably asked before, but where can I get that wallpaper in the top of the article?
  • Nice
  • I'm still using Vista from the PC which I bought 10 years ago. Does it mean no free upgrade to Windows 10 for me?
  • that's correct - you need to get it up to at least Windows 7 for the free upgrade. I think you can still buy Win 7 for less than Win 10 will cost, but I'm not sure it's worth the extra install steps. I took a laptop from vista to win 10 and it easily took a full day with many, many downloads and updates.
  • I have the update installed (KB3035583) but I don't see an app.  I uninstalled and reinstalled but nothing.  I am running Win  7 SP1 64 bit Home Premium.  Is there some way I can run the app from within File Explorer or something?
  • So I had to refresh/reset my surface yesterday which knocked it back to windows 8....after many updates im back on 8.1.....but now I don't have the windows 10 update app on my desktop do I get windows 10 now?
  • One question I didn't see, I going to update a tablet that runs on WiFi for a internet connection is this going to work or how do it do it?
  • another tip if your going to create a system image backup disconnect so it does not download Windows 10  or You can let the Windows 10 download then create a system image backup. Then after you finish setting up everything create a system image backup of Windows 10. I think I'm going to have to wait and see what happens first. 
  • It's mid-day July 28 and it's happening! I noticed significant download activity earlier today, about 3.5gb, and now I have a "$Windows.~BT" folder on my c: drive. I'm assuming the 6.5gb contains Windows 10 goodness, primed and ready to go tomorrow. Bring it!
  • Bugger. I thought I needed 16GB of free space on my Asus I've just had a huge uninstalling session! Now at 17GB free...only to find out I only needed 5! Haha
  • SpinzeroWL, how are you preparing your Asus T100 I have the same tablet anything special? Do we have to connect to wired internet or could do this by WiFi
  • How exactly does the clean install work? For example, how do I get a clean install of Windows 10 on my Surface Pro 3? Can I just put an ISO on a USB and install that way?
  • There are two ways, both involving downloading ISO to USB. 1) Mount the USB and boot from it using UEFI/BIOS to change boot order to USB first. 2) Click setup.exe within the ISO and install with the system booted. Since I do not have the knowledge to alter UEFI settings, I went with the latter for a lot of TP builds with no problems.
  • What gets saved when you update from Windows 7 to 10?  
  • Is there a way that I can just put in my windows 7 key from windows 10? I'm on windows rtm right now and I don't want to install 7 again just to get 10.
  • Can I upgrade to Windows 10 if I bought my laptop in 2008 and used vista?
  • Very helpful, thanks.
  • Mauro, I think you have made a mistake there with the support links for the manufacutrers. The link for Asus takes you back to this page The link for Toshiba takes you to Asus support site.  
  • Guys, I need some help if you can. I have few questions that i will really appreciate if you get me the answers. 1. My Win 7 Ultimate lap top have 2 partitions, C & D. On C we all know what it have, but D partition I usually use for storage partition, like keeping music files, pictures, videos etc. So my question is: Since this will be more or less like an OTA update, will Win10 recognize the partitions and install where it should be?  2. I have MS Office 2013 Full Pro version, will that remain as it is after the update? 3. Lets say i reserved the copy of W10 on my lap top, but after some time i buy a desktop machine. So, can I install the same copy of W10 that is on my lap top to my desktop comp? Like, with the same MS Account i have on my lap top? Thank you! :)
  • What does it mean when it says those who clean installed Windows 10 TP will only get a Windows 10 RTM build, but a pre-release version? I upgraded to W10TP over my only OS (8.1 on SP3), but when I had issues with a build I did a clean install of a newer build. Does that mean I will not get the official W10 release, only the pre-release RTM build?
  • OK. I have a situation,  I work in the Gulf of Mexico two weeks at a time. And as luck would have it in our here for the update. The issue is my wireless Internet is to show to download the update. But when I try to load the ISO on my work desktop which is a Win 7 enterprise edition it keeps telling me to reboot the PC and when I do I get the same error message. Is there any way to get the ISO files without having to use the media creation tool? Because that's where I keep running into the same issue.  Thanks in advance! 
  • Is there a seperate app/program that will test a PC for any issues before upgrading? As Windows 8.1 Enterprise does not get access to the "Get Wndows 10" app.
  • Hello,  This is for the people who are concerned about losing their data after the upgrade. I have many laptops and one laptop I chose to test this  free99 one year upgrade with was my 2010 Dell Inspirion N5010.. Pointing out the obvious of it being loaded with windows 7 originally. When I decided to upgrade windows, I  had my usb with backup files ready to install but after, to my surprise, windows 10 skipped all the manual work for the consumers and literally copied my greeting name, left my display screen files and system files intacted. I say no need for the usb. That should be the least of your worries. Aesthetically, its appealing. A mixture of windows 7 (yay!) and windows 8 (totally confusing) but even I can navigate it so far. So far so good. I'm testing performance so we will see.
  • Here is a link on a video "How to upgrade Windows 7 and Windows 8.1 to Windows 10 \ For free NOW" with step by step instructions about this:
  • I just downloaded Windows 10 through the upgrade, and it showed an error! And when I clicked try again, it restarted from scratch! Any help?
  • Here is tsep by step video how to upgrade to Windows 10 For free
  • I was installing windows 10 but my battery drained off. How do i reinstall it again? because when i check for updates in the control panel, it never finishes loading    
  • Oh it's really nice! and very helpful. If anyone wanna get ISO file of Windows 10 directly from Microsoft site then check out my mentioned steps to download ISO file of Windows 10 from Microsoft.
  • my pc already have the windows 10 (build 10240) but i am updating to newer version of windows it is necessary to format pc before updating or if I don't format the pc, it will create another folder of Windows.old