Microsoft WINMM WDM Audio Compatibility Driver (wdmaud) Service Defaults in Windows XP
MMSYSTEM Wave/Midi API mapper by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | Microsoft WINMM WDM Audio Compatibility Driver |
| Service name: | wdmaud |
| Service type: | kernel |
| Error control: | normal |
| Path: | %SystemRoot%\system32\drivers\wdmaud.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wdmaud |
Default Behavior
Microsoft WINMM WDM Audio Compatibility Driver is a kernel device driver. In Windows XP it won't start until the current user starts it. If the Microsoft WINMM WDM Audio Compatibility Driver fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the wdmaud service has failed to start.
Restore Default Startup Configuration of Microsoft WINMM WDM Audio Compatibility Driver
1. Run the Command Prompt.
2. Copy the command below, paste it into the command window and press ENTER:
sc config wdmaud start= demand
3. Close the command window and restart the computer.
The wdmaud service is using the wdmaud.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 XP installation media.