Windows 10 20H1 build 19035 ISO files now up for download

Surface Laptop 3
Surface Laptop 3 (Image credit: Windows Central)

What you need to know

  • Microsoft released the ISO files for Windows 10 Insider build 19035.
  • The files allow you to perform a "clean" install of build 19035.
  • You can download the ISO files directly from Microsoft (opens in new tab) now.

Windows Insiders can now get their hands on the ISO files for Windows 10 20H1 build 19035. The ISO files for this Insider preview build allow you to perform a clean install of 19035 on your PC. They're available to download now directly from the Windows Insider site (opens in new tab).

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Windows 10 build 19035 initially rolled out to Fast and Slow ring Insiders on December 4. Microsoft is winding down development on the 20H1 update now, so there aren't any new features to check out. However, build 19035 does include several fixes and a few known issues. Here's a recap:

General changes, improvements, and fixes

  • The build watermark at the lower right-hand corner of the desktop is no longer present in this build. This doesn't mean we're done…
  • We've completed the experiment related to how we deliver driver updates through Windows Update. Devices that were involved in the experiment will no longer see the Optional Updates link under Settings > Windows Update. This also resolves an issue where after successfully installing printer drivers from the Optional Updates section, the same driver is still showing as available for install. Thanks to the Insiders who have provided feedback on this feature.
  • We fixed an issue that could result in fingerprint (if enabled) sometimes unexpectedly not being offered as a sign-in option after waking your device from sleep.
  • We fixed an issue that could result in certain apps not launching the first time you tried after resetting the app via Settings.
  • Thank you for all the feedback you provided on the Store version of Notepad. At this time, we've decided not to roll this out to customers. Insiders may notice some changes as we remove this change from this build:
    • If you pinned Notepad to your Taskbar or Start menu, you will need to re-pin after you upgrade to this new build.
    • If you had certain file types set to open in Notepad by default, you will see a prompt when you try to open files of that type again and will need to re-select Notepad.

Known issues

  • BattlEye and Microsoft have found incompatibility issues due to changes in the operating system between some Insider Preview builds and certain versions of BattlEye anti-cheat software. To safeguard Insiders who might have these versions installed on their PC, we have applied a compatibility hold on these devices from being offered affected builds of Windows Insider Preview. See this article for details.
  • Some Insiders have reported when attempting to install recent builds, setup rolls back and returns error code 0xc1900101. In some cases, the update completes successfully on a subsequent attempt. If you are experiencing the issue, please be sure to file feedback in the Feedback Hub.
  • We're looking into reports of the update process hanging for extended periods of time when attempting to install a new build.
  • We're looking into reports of certain external USB 3.0 drives not responding with Start Code 10 after they're attached.
  • We've received reports of the Optimize Drives app incorrectly reporting that optimization has never run on SSD devices.

The Windows 10 20H1 update is expected hit a broad public release in the spring of 2020. Ahead of its launch, we expect Microsoft will begin testing the next major feature update for Windows 10 with Fast ring Insiders.

If you want to grab the ISO files and try them out, Insiders can download them now at Microsoft (opens in new tab).

Dan Thorp-Lancaster

Dan Thorp-Lancaster is the former Editor-in-Chief of Windows Central. He began working with Windows Central, Android Central, and iMore as a news writer in 2014 and is obsessed with tech of all sorts. You can follow Dan on Twitter @DthorpL and Instagram @heyitsdtl

1 Comment
  • Hey if you make a tutorial to reinstall a product key, the first step is to backup. I don't know why I followed this blindly, but I'm for sure out of a product key now you dumbo. Thanks