Microsoft Ships Emergency Windows Fix for RDS, Hyper-V, USB Audio
TL;DR
- Microsoft released out-of-band updates on September 14 across Windows 10, 11 and Server 2019/2022/2025 to repair the September Patch Tuesday.
- The prior update destabilized Remote Desktop Services, breaking RDP sign-ins and freezing servers, MMC, File Explorer and the Windows Update page.
- Windows 11 patches also fix Hyper-V Plan9 folder sharing with Linux VMs and USB Audio Class 1.0 multichannel, though some audio issues remain.
Microsoft on September 14 shipped out-of-band updates to fix Remote Desktop Services failures introduced by its September Patch Tuesday, BleepingComputer reports. The rollout spans Windows 10 21H2 and 22H2 (KB5129236), Windows 11 24H2 and 25H2 (KB5129195), Windows 11 26H1 (KB5129194), and Windows Server 2019, 2022 and 2025 (KB5129238, KB5129237, KB5129235).
Microsoft's advisory says RDS might "become unstable, causing RDP connection and sign-in failures or servers to become unresponsive during Remote Desktop configuration" after the September security update. Affected boxes also saw Microsoft Management Console, the RDS Licensing Diagnoser, File Explorer and the Windows Update page stop responding.
The Windows 11 updates additionally address a Hyper-V regression where "Folders shared from the Windows host using Plan9 did not appear or could not be accessed in the guest environment" on Linux VMs, plus a USB Audio Class 1.0 bug that broke 8-channel and 3D audio modes while standard stereo kept working. The KB also references CVE-2026-62721, a Windows User-Mode Power Service elevation of privilege vulnerability.
Not everything is fixed. Some USB Audio Class 1.0 devices still fail to start after the September 8 update, and Microsoft says it is "working on a fix for the remaining audio problems."
Originally reported by bleepingcomputer.com
Read the original article →Original headline: Microsoft Ships Out-of-Band KB5129195 Fixing RDS, Hyper-V and USB Audio Bugs From September Patch