Microsoft released emergency out-of-band Windows updates to fix Remote Desktop Services failures caused by September 2026 security updates, which also affected some Hyper-V and USB audio functionality. The updates restore RDP access and address several Windows Server and Windows 11 issues while Microsoft continues working on remaining USB Audio Class 1.0 problems. #Microsoft #WindowsServer #Windows11 #RemoteDesktopServices #HyperV #USBAudioClass10
Keypoints
- September 2026 updates caused Remote Desktop Services instability and RDP sign-in failures.
- Microsoft released emergency out-of-band fixes for multiple Windows and Windows Server versions.
- Affected systems could also stop responding in MMC, File Explorer, and Windows Update.
- The out-of-band updates also fix a Hyper-V issue involving HCS-managed virtual machines and Plan9 shared folders.
- Some USB Audio Class 1.0 multichannel audio problems remain unresolved, and Microsoft is still working on a fix.