Known Issues - Windows 10 Desktop Insider Preview Build 14915
Adobe Acrobat Reader crashes when you try to launch it.
You may experience a black screen when signing out and switching to another user account and will be unable to log in to that account. A reboot of your PC should allow you to log in to that account.
Bash 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 “Windows Subsystem for Linux (beta)” and click ok. After a reboot, Bash should work again.
The Settings app may crash when going to Settings > Personalization.