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Microsoft pushes Windows 10 build 10049 with Project Spartan to fast ring users

Released just moments after hints of a new build popped up on Microsoft's Dev Channel website, build 10049 finally brings the Project Spartan browser to the Windows 10 Technical Preview, along with a number of bug fixes.

Along with the inclusion of Project Spartan, here's a list of the issues fixed in build 10049:

  • "We've fixed the issue from Build 10041 for when the Photos app on your PC crashes when you tap on the circular icon at the top left to view the photo you just took.
  • We've also fixed the issue from Build 10041 where you might end up in a state where windows open on your desktop are accidentally visible behind the Start Screen, Task View, Snap Assist, and when rearranging windows in Tablet Mode.
  • You will no longer get stuck when you manually lock your PC (Windows Key + L) during the initial out-of-box experience."

And the list of known issues affecting this build:

  • After logging in, you may see a blue screen instead of your desktop. To work around this issue, lock your PC (with the hardware button or by pressing the Windows Key + L) and try logging in again. You can also try Ctrl + Shift + Esc to open Task Manager.
  • Indexing of new email in Outlook is not working, so search results will be limited to when the last index was built.
  • If you have Virtual Machines hosted on your PC running Windows 10, you will want to move to the Slow ring and wait for the next build as this build breaks the ability to run VMs.
  • There are 2 issues using Visual Studio 2015 preview on this build:
  • The emulators will not boot and you won't be able to deploy a Windows Universal app to the Mobile emulator.
  • The XAML designer in VS and Blend will crash when opened.
  • If you are a developer using these tools today to develop Windows Universal apps and need this functionality to work – we recommend switching to the Slow ring until we release a patch to fix these issues.

To recap, this build is releasing to fast ring users only today — ISO files won't be available until the build is released to the slow ring at a later time. Additionally, it isn't recommended that developers update to this build due to the issues with Visual Studio noted above.

Source: Microsoft

Dan Thorp-Lancaster is the Editor in Chief for Windows Central. He began working with Windows Central as a news writer in 2014 and is obsessed with tech of all sorts. You can follow Dan on Twitter @DthorpL and Instagram @heyitsdtl. Got a hot tip? Send it to daniel.thorp-lancaster@futurenet.com.

127 Comments
  • Uptown funk you up . Haha,,, can't wait to try this
  • Do not forget uninstalling chrome :P
  • Sure thing dude :P
  • I'm not sure how Spartan, or even IE could serve as Chrome replacements just yet. Especially if you heavily rely on the many extensions. Comparisons of Internet Explorer, Opera, Safari, and an early Spartan build(inside IE) and Firefox by the YouTuber Austin Evans declared the winner Chrome which scored higher than the rest of the browsers in around 4 of the tests. https://youtu.be/8RLuPHI04Sc I'm sure I will receive a lot of hate here, but tons of people diss Chrome too easily and I needed to put this out there, also interesting is that IE could barely win any tests against Chrome. Lastly this was obviously done on an early build of Spartan, improvements will come, and competition is always great. But no, this won't make a ton of us Chrome users uninstall our browser. :) Posted via the Windows Central App for Android
  • Chrome is a mem hog for my laptop, and on my Win10 preview chrome wont even show YouTube videos.  Other 2 browsers do, yes it has been reinstalled drivers etc. As well, a few sights I visit cause chrome and adobe flash to crash nearly all the time. (phonearena, zdnet, 9gag, youtube...) I am VERY glad i DO NOT rely on extensions to browse the web.  That to me is so silly, i can see the benefits, but none so far have me installing even one extension other than ad block. The only reason, chrome is on my pc, is for when i do html/css coding.
  • Agree on Chrome being such a memory hog. I mean seriously, what kind of terrible coders do they have at Google when browsing the web for an hour hogs up 1.5GB of RAM? That's insane. Plus, don't even get me started on the poor trackpad performance. Salmanahad can throw around Youtube videos that he wants to show how it has marginal performance gains over the competition, but when Google can't even get the basics right, it's not nearly enough for me to use Chrome on a daily basis. I've actually got it installed and try to use it every couple of months to see if it's improved, but it never is. Spartan can't come soon enough!
  • Chrome has poor trackpad support? I use a trackpad on Chrome on a daily basis and I've also used Internet Explorer and they are both about equal in the way it works, if I am wrong, please tell me. The main issue with Chrome is the scrolling performance with touch input, on even the most powerful of hardware the browser stuttered on quite a few websites. But thanks to Microsoft, Chrome will likely have much better scrolling on both laptops and mobile. Trackpad? I think they already are doing fine. Posted via the Windows Central App for Android
  • Poor trackpad scrolling has been consistently documented across every site to the point where I don't even believe you read tech sites lol. It's been addressed in The Verge, CNET, this very site, Ars Technica, etc.... Trackpad scrolling is jumpy for me on every laptop I use, whether it be from Dell, Microsoft, Lenovo, you name it. Maybe you're use to it and your eyes don't notice it, but its been well documented.
  • Chrome is a memory hog? With personal experience and Austin Evan's test it is clear that the RAM consumption by Chrome is less than Internet Explorer, however Spartan does edge it out ever so slightly. Also about the whole RAM topic, unless the memory Chrome takes up can be better used by the system or another app I don't see how more memory consumption should be a problem, I've compared loading very heavy webpages on both Chrome and IE and found that while both consumed an equal amount of RAM, Chrome managed to stay responsive for longer. Also the issues you are facing with Chrome on Windows 10? Could that not boil down to the fact that Chrome *probably* isn't fully compatible with the new Windows version. Also I have few Chrome extensions, but they are absolutely essential to me. I have an extension that disables anything that has to do with Adobe Flash(until I explicitly tell the browser to play something) because Flash drains a ton of battery. I have another extension called ZenMate, this allows me easy access to YouTube through the browser because otherwise YouTube is banned in my country. And my most important extension is PushBullet, I can easily receive the notifications of my phone on my laptop and interact with them or swipe them away, easily send or receive content between my phone and laptop and so on... And I am sure there are a ton of other useful extensions people use on Chrome, until Spartan gets support for even a fraction of those extensions maybe, just maybe, I'll uninstall Chrome and switch. Posted via the Windows Central App for Android
  • Chrome has been dead to me for years. IE was a huge improvement in W8 and has touch usability down (something Chrome is horrible at). The performance gains in Chrome are mostly invisible to most users and a lot rely on Webkit specific HTML extensions rather than HTML5 standards. If I want an alternative I'll go Firefox or Vivaldi.
  • The spartan they used cannot even be considered an early build really. It's build in in IE and it has been said again and again that with like that, you cannot judge how spartan will perform.
  • Personally, all I need is adblock, which IE has built-in via filter lists :p
  • already done since IE10 ... only using IE11 and FF now
  • Update size?
  • Sweet
  • Not really, it says there an error where Visual Studio crashes... This will deeply effect my development as slow as my PC already is.
  • Yeah, I'm not sure if some of this was carryover. Blend crashed in 10041 for me. I uninstalled 2015 ctp and reinstalled not knowing it may have been an os issue and then VS crashed on me as a whole. Hoping there will be an update soon for these issues.
  • Yeh im sure they'll fix it soon, this is crucial for them if developers cannot work.
  • Try the slower build. Woks fine for me. I do deploy and start the emulator. If it freezes, closes VS but not emulator. Restarts VS works fine.
  • Same here. Why release an update that breaks Visual Studio? Makes no sense. Ill wait untill the update with a fix is released.
  • sorry to ask but who are fast ring users?  
  • People that are willing to deal with more crashes and bugs, and report them to MS.  Not be a whinning little b when something doesnt work and instead provide feedback and steps on what caused it in the first place back to MS.  Without it, the dev process will be much longer.  Slow users will get an ISO with updates that 10041 users will get before them.
  • Cos it's a technical preview. It's not aimed (yet) at being used on a main dev machine.
  • I assume that'll be during the Developer Preview, however, they are aware that developers are using/testing this software, after all, they released the Windows 10 SDK preview, so they will aim it toward devs soon.
  • Man I totally thought that the last article was about the phone build... I saw the comments that it was out and got excited
  • Where you'd seen that?
  • The article posted right before this about Spartan being in the next build, skimmed through it quickly assuming it was about the phone preview
  • That was just rumors
  • Ummm no... Spartan is in the build
  • Soo sad..
  • Uninstalling google chrome ;))
  • Why have you ever used Chrome though... Firefox forever B-)
  • Nah man, I should admit Chrome is much better and faster than Firefox( and Opera, Maxthon)
  • Maxthon was a great browser, I used it often when playing online browser games.
  • Firefox is much more customizable and powerful in terms of addons. Firefox also uses less RAM. Speed is about the same. Google Account sync does work better than Firefox Sync, but that is about it.
  • I'll take your word that google sync works better since I don't use google for much But how is it better?  I use Firefox Sync and its syncs my bookmarks everywhere I ask for it on all my devices. What does it do that is better IYHO?
  • I am experiencing some bugs with Firefox sync, such as every time I clear my browsing data from my laptop and my other computer is off, when I turn on my other computer, the cleared browsing data just syncs right back to my laptop from the other computer. Google Account sync has been bug free for me. I may be having an isolated case though.
  • I suspect its isolated too. I've never seen that but all configurations are different.
  • For me, all browsers seem to have a problem with my system slowing down once I get beyond 5-6 tabs open at one time.  Closing tabs doesn't seem to solve the problem, suggesting that they leave artefacts in memory. No browser seems to be compatible with every web page either. What won't open in one often opens in another. Even if the page opens sometimes not all the functionality will work but it will after reopening the page in another browser.    IMO, no one can get away with just using one browser exclusively.   
  • Firefox for life :)
  • can i send all my bookmark from chrome to IE (or spartan?)
  • umm Im not sure, but I could send my bookmars from chrome to firefox
  • I use XMarks to sync my bookmarks between multiple browsers including IE, Firefox, and Chrome. You may want to check it out. The desktop version is free.
  • thanks! ill try it now
  • hey thanks for letting me know smarks, its awsome xDD. I just synced all my bookmarks from chrome to IE and firefox in little steps
  • Click on the Star icon in IE. Click the drop down arrow next to 'Add to favorites' and select 'Import and export...' There is an option to import from most any browser. Also if you haven't used IE the first time experience thingy prompts you to import everything.
  • Export your Bookmarks as HTML, then in IE you can import the bookmarks.
  • I think you can. Just import feature on IE
  • THIS ^.........just need Hangout chat extension, I don't think my friends week be using Skype to chat
  • ^^^^this (main comment)
  • Palemoon FTW
  • "its a little late for Microsoft to push out a new build"
    Come on, John, step your game up!
  • Yeh, its quite early actually, for a fastring
  • WC just saying how MS doesn't usually do updates this late...
    ......
    Guess anything is possible in MS land..
  • Late and on a Monday. Weird.
  • I'd take a late TP update for my 1520 as long as it's soon... Don't give a damn what time a day❕ Lol.
  • It's not Monday everywhere.... ;-)
  • Did not expect this today!!
  • I gotta say I wasn't expecting a new build so soon. But it's very welome!
  • Only project Spartan is new, any new feature(s)/UI change(s)...???
  • read the article, lol
  • The article only mentions Project Spartan (and a few bugs) I am talking about any other feature that's new to this build....
  • Time for say goodbye to chrome
  • I would not go that far, unless you will not miss extensions.  
  • When I get home...
  • Damn. Thought it was for WP.
  • They weren't joking about speeding up the fast ring. Wow. Downloading some Spartan goodness now!
  • Good thing I read the article before installing. I have a few VMs to move to my primary machine before updating my test hardware to this build. Let's see how Spartan is looking!
  • Again a new build for windows pc.
    Microsoft please release a windows 10 preview for phone
  • Didn't they just say a day or two ago that they need at least another week for phone?
  • I sit and read the article, and I just think wow, the quest for a stable new OS is a mammoth task! I'm not an imbecile, I genuinely realised it was a huge task, but sometimes you get so used to seeing some armchair developers bemoaning"lazy" MS employees. You can easily start to let it taint your appreciation and scale. Don't get me twisted, I know that not everything they do will perfectly implemented, but kudos to them for doing this stuff.
  • Yeah, developing an application is one thing. Extending and programming an operating system (kernel with tons of drivers) is something else.
  • What they're doing is unpecedented. Alpha software is very delicate and most are hesitant to even release that to the public. An alpha (or even beta) operating system is in another stratosphere. You could literally make an encyclopeida out of all the code they're dealing with. It's amazing that they're allowing users to preview so early and provide feedback. Anyone who doesn't expect bugs isn't familiar with the SDLC which I don't knock anyone for and I know it'll all work itself out as they approach RTM and make final decisions on which features to keep and refine. 
  • I hope that some apps will fir into the screen
  • Fit into the screen and the bottom could be readable again
  • Is touch mode usable on Surface Pro 3 yet?
  • Hopefully they get things better than last time for slow ring
  • Time for Spartan review please ;)
  • Of a preview product?
  • Windows 10 is also a preview product :p
  • Which is why we didn't review it yet :)
  • And about First impressions? ;)
  • Yeah seriously, I've already seen Spartan vs chrome comparisons and tests... ? Wait until it's official guys
  • My guess this build was really just a bug fix service pack with Spartan included as the next build will include more features and changes. Good though
  • I'll uninstall opera as soon as extensions support is there
  • It's never the bugs that affect me that get fixed. I constantly get the cortana/search bar locked where I cannot type anything into it. Also autohide on the taskbar never works when you have a window full screen but that has been an issue since 8.1. I'm guessing they will never fix that.
  • Wow. That was really fast. I manage to install 10041 last Thursday.
  • yeaaaaaaaaaaaaah welcome spartan  
  • Downloading now!
  • New build completely hosed scrolling for me through IE or Spartan. My XPS 13 (9343) refuses to scroll in either browser. Still “works” in chrome which is to say not very good but hey its something. Anybody else have similar scrolling issues after updating?  
  • Check your about:flags there is some scrolling stuff in there, change the settings see if it works.
  • I'm unable to launch about:flags. Browser just do nothing after I press Enter :(
  • I also have an XPS 13 2015 model and scrolling is completely broken in IE and Spartan. Scrolling only works through touchscreen and arrow keys. Two finger touchpad is broken. I experimented with about:flags in IE (Doesn't work in Spartan) and none of the settings fixed anything. Let me know if anyone managed to fix this.
  • Good to know I am not the only one but unfortunately I don't have any better news. I have tried installing different synapatics drivers, updated the BIOS to A_03 and messed around in Device Manager but so far nothing has helped. Will keep watching and hope that somebody figures out what happened.
  • I'm yet to receive any new builds by Windows Update. So far I've waited and downloaded the new build ISO twice in order to update. I've tried switching between fast and slow ring, with reboots in between and then checking for updates, but while other updates show, the build updates never do. Any suggestions?
  • Clear the update cache? Reformat the machine and try again?
  • Updates cache? How can I clear it?
  • I've installed this build on my PC but can't install it on SP3. It just reboots as usually without installing updates, however it asks to reboot because of new update.
    Am I alone with such problem?
  • You are not a lone, same problem here on SP3. Installed fine on original Surface pro.
  • Same here on my SP3
  • I hope the next big update will come out for phones too
  • ...soon
  • Do Realtek drivers work
  • So far so good! Mine would NOT install the Realtek last build, but sound is working again with 10049. :)  
  • Size ?
  • doesn't matter  
  • Has anyone tried with visual studio 2013?
  • Im just going to school when i come back i will totally gonna download this build spartan browser rocks
  • I'll be honest, I'm getting a bit concerned here... there are A LOT more new issues with this build.  Now Mail, People, and Calander are totally gimped, do not work, and cannot be installed through the store because it constantly errors out.  Right clicking on something brings up a menu with no words highlighted in black.  And finally, Spartan has MAJOR issues displaying sites correctly embedded with Flash.   Back to 10041
  • 10041 initially had same problem. MS released a patch several days following release to fast track. In this build, things like right-click actions on start menu (e.g., 'command prompt') works; left-click on network notification icon not only works but adds two new toggles: wifi and airplane mode.  Like 10041 and 10029, had to reactivate my office 2013 install as well as reinstall a slew of apps (remote desktop, onedrive, webconnect...). Never really cared for the people app and only kept it for the desktop calendar tile.  Cheers Posted with Spartan Technology (Go Green!)  
  • Browsing Windows Central and commenting here thru Project Spartan! Cool!
  • Waiting for ISO.
  • I just get a plain blue screen every time I restart my system. No logon page.. No key combination does anything... :(
  • Read the bleedin' article.  It's in the notes.    
  • Slow but suck.
    Keep it slow Microsoft
  • I am seeing Error code: 0x80073cff when trying to reinstall Mail, Calendar and People.
  • Check Insider Hub for the fix on previous build - 'Known issues in Build 10041'.  Try the Powershell command.  
  • I get a blue screen saying windows ran into a problem, before I can log in. Restarting doesn't work.
  • The update killed Cortana. Can't hear her, and she can't hear me.
  • We've also fixed the issue from Build 10041 where you might end up in a state where windows open on your desktop are accidentally visible behind the Start Screen, Am I the only one who thought that was an intentional feature? I also way preferred it!
  • After some jumping through some hoops, I'm finally sitting back and relaxing to the Spurs game. When I first installed Win10TP, I partitioned 30-40GB for the OS and down the road had to add more space to account for the updates. And with the latest update, I didn't have enough space again to complete the install, so I had to run disk cleanup and set the paging file to the absolute minimum. We'll see how it pans out.
  • *originally started with 20GB and had to add more GB down the road, now currently on 30GB
  • sir i need anti virus for my lumia 820.can i instal anti verus in my phone  
  • http://talhawebz.blogspot.com/2015/04/window-10-pro-technical-preview-build.html Download ISO of Window 10 Pro+Enterprise Technical Preview Build 10049 (English-US) Here I hope You will enjoy the build 10049
  • Bad build  Cortana not working, IE crashing, can't type into Spartan search field  POS if you ask me.
  • Nearly 7hours installing, still not finished (like 98%) a bit slow no? :P