If a USB headset, DAC, mixer or sound card stopped working after a Windows update, the device itself may not be faulty. Microsoft has confirmed a Windows 11 problem affecting some USB Audio Class 1.0 devices after the security update released on 8 September 2026.
The fault affects Windows 11 versions 24H2, 25H2 and 26H2. Microsoft does not list Windows Server as affected.
What the fault looks like
You may see one or more of these symptoms:
- Device Manager says: "This device cannot start (Code 10)."
- The USB audio device appears but produces no sound.
- Its volume control stays at zero or does not respond.
- Windows Sound settings are missing or stop responding.
- Stereo works, but an 8-channel or 3D audio mode does not.
The timing matters. Microsoft links the problem to security update KB5124012, released on 8 September 2026. If the audio fault started before that date, or the device also fails on another computer, a cable, USB port, power supply or hardware fault is more likely.
What you can safely try
Start with the simple checks. Restart the PC, disconnect the USB audio device, and reconnect it directly to another USB port rather than through a hub. If possible, test it on a second computer. These checks help separate a Windows problem from a fault in the device or cable.
If your audio software offers a channel setting, try standard 2-channel stereo. Microsoft says some customers regained sound this way when multichannel modes failed. It is a workaround, not a full repair, and it may not help a device showing Code 10.
Next, open Settings > Windows Update > Update history and check whether KB5124012 is listed. Keep Windows Update enabled. Microsoft released out-of-band update KB5129195 on 14 September 2026, but describes the fix as partial: it addresses symptoms involving 8-channel and 3D audio modes, not every reported USB audio failure.
Microsoft's release-health page was updated on 30 October 2026 and still said it was working on the remaining symptoms. That means repeatedly removing drivers, installing drivers from unofficial download sites or changing the registry is a poor first move. It can make diagnosis harder and introduces extra risk.
When repair help makes sense
Ask for help if the USB audio device is needed for work, calls or recording, if Device Manager shows Code 10 after updates are current, or if you cannot tell whether Windows or the hardware is at fault. A support session can confirm the Windows version and update history, check the device and audio services, and rule out a bad port, cable or driver without wiping the computer.
Bring the USB audio device and its cable if the PC comes into the workshop. That allows the complete setup to be tested rather than guessing from the computer alone.