Microsoft 1.1 UAA Function Driver for High Definition Audio Service (HdAudAddService) Defaults in Windows 10

High Definition Audio Function Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:Microsoft 1.1 UAA Function Driver for High Definition Audio Service
Service name:HdAudAddService
Service type:kernel
Error control:normal
Path:%SystemRoot%\System32\drivers\HdAudio.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HdAudAddService

Default Behavior

Microsoft 1.1 UAA Function Driver for High Definition Audio Service is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If Microsoft 1.1 UAA Function Driver for High Definition Audio Service fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the HdAudAddService service has failed to start due to the error.

Restore Default Startup Configuration of Microsoft 1.1 UAA Function Driver for High Definition Audio Service

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config HdAudAddService start= demand

3. Close the command window and restart the computer.

The HdAudAddService service is using the HdAudio.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 10 installation media.