Today, a new build for both fast ring and skip ahead users – Build 17661 has been released. Bringing in some new features, fixes, and a few new issues, it is the start for Red Stone 5 builds for the Fast Ring (Skip Ahead have been receiving them for a while). As usual, check out the Known Issues before updating, just in case there is a show stopper in there!

Known issues

Certain notifications from Action Center may cause regular Explorer.exe crashes. We’re working to get this fixed in the next flight.
VPN may not be working after updating to this build. To get VPN working again, delete the %ProgramData%\Microsoft\Network\Connections\pbk* directories. Check if the VPN profile you need shows up already and if not, reinstall the appropriate VPN client app you need.
After updating to this build and installing the latest app updates from the Microsoft Store, when you log in to additional user accounts on the PC there may be missing apps. You can run the following PowerShell script when logged in to users with missing apps on your PC to fix the issue: Get-AppXPackage *WindowsStore* -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}
On resuming from sleep, the desktop may be momentarily visible before the Lock screen displays as expected.
When Movies & TV user denies access to its videos library (through the “Let Movies & TV access your videos library?” popup window or through Windows privacy settings), Movies & TV crashes when the user navigates to the “Personal” tab.
We’re aware of an issue that causes Narrator to read extra text when invoking Alt + Tab, and we’re working on a fix.
If you complete the setup for a Windows Mixed Reality headset on this build, the headset will remain black until it is unplugged and reconnected to the PC.