Windows 11 update KB5124008, released on September 8, has caused significant audio issues for users, including failure of audio devices to initialize or produce sound, and problems with microphones and multichannel audio. The update is linked to Explorer.exe crashes, disruptions in File History backups, Remote Desktop difficulties, and GPU issues on certain AMD systems. Microsoft has acknowledged these problems and indicated that the audio issues primarily affect USB Audio Class 1.0 devices. Users may see error logs in Device Manager indicating "This device cannot start (Code 10)." A temporary workaround is to switch to a 2-channel mode, and wireless audio devices appear to be unaffected. Microsoft is working on a permanent solution.