🔴 Microsoft: September updates break audio on some Windows PCs

Microsoft has confirmed that USB audio devices may fail on some Windows systems after installing the KB5124008and KB5124012 September 2026 security updates.

This known issue affects only devices running Windows 11, version 24H2 or later, and is limited to USB Audio Class 1.0 devices.

"After installing the September 8, 2026, Windows security update [..], some USB Audio Class 1.0 devices might fail to start or produce audio," Microsoft said in a Friday update to the release health dashboard.