Microsoft UAA Bus Driver for High Definition Audio (HDAudBus) Service Defaults in Windows 11
Default Settings
| Startup type: | Manual |
| Display name: | Microsoft UAA Bus Driver for High Definition Audio |
| Service name: | HDAudBus |
| Service type: | kernel |
| Error control: | normal |
| Group: | Extended Base |
| Path: | %SystemRoot%\System32\drivers\HDAudBus.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HDAudBus |
Default Behavior
Microsoft UAA Bus Driver for High Definition Audio is a kernel driver. In Windows 11 it starts only if the user, an application or another service starts it. If Microsoft UAA Bus Driver for High Definition Audio fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the HDAudBus service startup failure.
Restore Default Startup Configuration of Microsoft UAA Bus Driver for High Definition Audio
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config HDAudBus start= demand
3. Close the command window and restart the computer.
The HDAudBus service is using the HDAudBus.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 11 installation media.