Overview
- September's Patch Tuesday updates, released on Sept. 8, triggered widespread Remote Desktop Services instability that caused RDP connections to drop, sign-in failures, and servers to hang.
- Microsoft acknowledged the RDS problem, published Group Policy mitigations for enterprise environments, and recommended restarting or deallocating affected virtual machines as a temporary measure.
- On Monday, Sept. 14, Microsoft rolled out multiple out-of-band updates (specific KBs per build) that restore RDS for many Windows 10, Windows 11, and Server versions and are available via Windows Update, WSUS, and the Microsoft Update Catalog.
- The emergency patches also fix some Hyper-V Plan9 file-share issues and several USB Audio Class 1.0 multichannel failures, but some USB audio symptoms and an Excel silent-paste failure remain unresolved.
- Administrators can restore access by uninstalling the September updates but doing so removes that month's security fixes, creating a direct trade-off between operational continuity and applied security patches.