# Windows 11 update causes audio issues for legacy USB devices Microsoft confirms sound failures on older USB Audio 1.0 devices after September update - **Source:** [Latest news](https://brifing.si/source/77d15218-219f-472d-bf40-31b5646d2942) - **Published:** 2026-09-14 - **Original article:** - **On Brifing:** https://brifing.si/s/8144648f-bd22-4fe9-82a1-1943eadb09fe ## The problematic update Microsoft's September Patch Tuesday update (KB5124008) has caused audio failures on USB Audio Class 1.0 devices. These legacy devices use the Usbaudio.sys driver dating back to Windows 98. The issue affects speakers, headphones, and microphones connected via USB. Microsoft has acknowledged the problem on its known issues page but hasn't yet released a permanent fix. ## Understanding USB Audio Classes USB Audio Class 1.0 represents older audio technology from the late 1990s, while most modern devices use USB Audio Class 2.0. The 1.0 standard was revolutionary for its plug-and-play capability without manufacturer-specific drivers. Despite being outdated, many users still maintain legacy audio equipment, making this issue relevant for a subset of Windows 11 users. ## Impact on users Affected users experience complete audio failure or distorted sound from their USB devices. The problem exclusively impacts devices using the 25-year-old driver architecture. Microsoft estimates thousands of users could be affected, particularly those with older conference room systems, vintage audio equipment, or budget peripherals still in use. ## Technical background The Usbaudio.sys driver was Microsoft's universal solution for USB audio devices before manufacturers developed their own drivers. While innovative in 1998, its architecture conflicts with modern Windows 11 security protocols implemented in the September update. This marks another instance where Microsoft's update cycle clashes with legacy hardware support. ## Current workaround solution Microsoft suggests switching affected devices to stereo mode as a temporary fix. The audio failures primarily occur in multichannel configurations (5.1, 7.1, or 3D audio). Users can reconfigure through Control Panel > Sound > Playback by selecting stereo mode instead of multichannel options. This has successfully restored audio for many reporting the issue. ## Step-by-step fix guide To implement the workaround: 1) Open Control Panel in icon view 2) Click Sound applet 3) Select Playback tab 4) Choose affected USB device 5) Click Configure 6) Select Stereo under Audio channels 7) Complete setup wizard 8) Test audio. This process takes about two minutes and doesn't require technical expertise. ## Industry context This incident highlights the ongoing challenge of maintaining backward compatibility in operating systems. While Microsoft typically supports legacy systems for decades, the security requirements of modern computing increasingly conflict with older architectures. Similar issues have emerged with printer drivers and older peripheral support in recent Windows updates. ## Looking forward Microsoft is developing a permanent fix expected in October's Patch Tuesday. Until then, users must either use the stereo workaround or revert the update. The situation underscores the importance of testing updates across diverse hardware configurations, especially when dealing with decades-old technologies still in active use. ## Sources covering this story - https://www.zdnet.com/business/windows-11-sept-update-audio-glitch-fix-2/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._