Microsoft confirmed that the KB5124008 and KB5124012 September 2026 security updates can cause USB Audio Class 1.0 devices to fail on Windows 11 version 24H2 and later systems. Affected users may see Code 10 errors, no audio output, or broken multichannel playback, while Microsoft is still working on an official fix. #Microsoft #KB5124008 #KB5124012 #Windows11
Keypoints
- KB5124008 and KB5124012 can break USB Audio Class 1.0 devices.
- The issue affects Windows 11 version 24H2 and later.
- Users may see Device Manager Code 10 errors and no audio.
- Multichannel audio modes such as 3D audio and 8-channel can be impacted.
- Switching to 2-channel mode may restore audio on some systems.