Here are the fixes, improvements, and known issues in Windows 10 for PCs build 14931

Microsoft today released Windows 10 for PCs build 14931 to the Fast ring. The build contains a handful of minor new features (mostly app updates), but as always, there is a list of fixes, improvements, and known issues.

Here's what got fixed and improved:

  • We fixed the issue causing people to experience a black screen when signing out and switching to another user account and unable to log in to that account.

  • We fixed the issue causing the built-in Windows 10 apps such as Calculator, Alarms & Clock, and Voice Recorder to not work after updating to a new build.

Here are the known issues:

  • While using Narrator and Groove Music, if you navigate to the progress bar while a song is playing then Narrator will continually speak the progress of the song e.g. update with the current time of the progress bar every second. The result is you will be unable to listen to the song or hear any other control you navigate to.

  • Oracle VM VirtualBox will crash on launch after upgrading to this build.

  • Optional components may not work after upgrading to this build. To get it working again, go to “Turn Windows features on or off”, scroll down and check the right optional component and click ok. After a reboot, the optional component will be enabled again.

  • For keyboard users, using tab to navigate the Settings app will not work in this build. The arrow keys should work as a temporary workaround.

  • Tencent apps and games will cause your PC to bugcheck (bluescreen).

It's always worth checking the known issues before installing a build. For example, if you use Oracle's VirtualBox, you might want to skip this one.

If you're on the Fast ring, you can grab build 14931 by heading over to Settings -> Update & security -> Windows Update -> Check for updates. If you want to sign up for the Fast ring, go to the Windows Insider Program tab and click Get started. Once your PC reboots, go back and make sure you're in the Fast ring.

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