Microsoft details three known bugs in Windows 11 26H2

Windows 11 26H2 is rolling out with no new consumer features, but Microsoft confirmed at least three issues: broken USB audio, sign-in failures on Credential Guard enterprise machines, and black screens on Azure Virtual Desktop hosts. Because 26H2, 25H2 and 24H2 share the same code and servicing branch, the bugs and fixes are identical across all three.

• USB Audio Class 1.0 devices may fail to start, killing sound and mic with a "Device cannot start" error
• Sound settings become unresponsive or crash when users try to troubleshoot
• Credential Guard machine accounts in Active Directory can lose their secure channel and block sign-in
• Black screens and desktop loading issues hit Azure Virtual Desktop hosts