Windows 10 Build 20251 is out to the Dev channel

Microsoft has released a new Dev build to Insiders. It comes from the FE_RELEASE, and doesn't include new features. The build number is 20251, and it only includes general fixes and improvements.

Looking at the change log available for this release, you might think that rumors that 21H1 is a minor release of Windows 10 are not that far from reality.

What's new in Windows 10 build 20251

Fixes

• We fixed an issue resulting in the background of some dialogs to unexpectedly appear grey instead of white in the last couple flights.
• We fixed an issue resulting in the taskbar occluding the Power button in the Start menu for some Insiders recently.
• We fixed an issue resulting in some Insiders seeing a SYSTEM THREAD EXCEPTION NOT HANDLED bug check.
• We fixed a crash with opengl32.dll.
• We fixed an issue that could result in the Settings app hanging when checking for updates right after upgrade.
• We fixed an issue that could result in the Settings app sending a notification that just said “new notification”.
• We fixed an issue resulting in the Search Indexer not being able to retrieve metadata from HEIF and WebP files, so you couldn’t search for those files using metadata like date taken.
• We fixed an issue resulting in the Cast to Device option in Movies & TV (and other media playback apps) not taking any action when clicking on a listed device in recent builds.
• We fixed an issue in recent builds that could result in the screen you were projecting with Miracast freezing shortly after connecting.

Known issues

• We’re working on a fix for an issue starting with Build 20236 where installing games from the Store to a secondary non-OS drive will result in the secondary drive becoming inaccessible. To prevent this from occurring you must change the default storage for new content to the secondary drive PRIOR to installing the game. This can be done in Settings > Storage > Change where new content is saved.
• We’re looking into reports of the update process hanging for extended periods of time when attempting to install a new build.
• Live previews for pinned sites aren’t enabled for all Insiders yet, so you may see a grey window when hovering over the thumbnail in the taskbar. We’re continuing to work on polishing this experience.
• We’re working on enabling the new taskbar experience for existing pinned sites. In the meantime, you can unpin the site from the taskbar, remove it from the edge://apps page, and then re-pin the site.
• We’re working on a fix for an issue causing some devices to experience a DPC_WATCHDOG_VIOLATION bugcheck.
• Windows Insiders on ARM PCs such as the Surface Pro X will notice that Windows PowerShell will fail to launch on this build. As a workaround, please use “Windows PowerShell (x86)” or “Windows PowerShell ISE (x86)” from the Start menu if you need to use PowerShell. Or download the new and modern PowerShell 7 which takes advantage of ARM by running natively. Plus the icon is prettier.
• We’re investigating reports that some users are seeing error 0x80070426 when using their Microsoft account to sign into various apps. If you encounter it, rebooting your PC may resolve this.

Updates for developers

The Windows SDK is now flighting continuously with the Dev Channel. Whenever a new OS build is flighted to the Dev Channel, the corresponding SDK will also be flighted. You can always install the latest Insider SDK from aka.ms/InsiderSDK. SDK flights will be archived in Flight Hub along with OS flights.