RAS Asynchronous Media Driver (AsyncMac) Service Defaults in Windows 11
RAS Asynchronous Media Driver.
Default Settings
| Startup type: | Manual |
| Display name: | RAS Asynchronous Media Driver |
| Service name: | AsyncMac |
| Service type: | kernel |
| Error control: | normal |
| Path: | %SystemRoot%\System32\drivers\asyncmac.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AsyncMac |
Default Behavior
RAS Asynchronous Media Driver is a kernel driver. In Windows 11 it starts only if the user, an application or another service starts it. If RAS Asynchronous Media Driver fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the AsyncMac service startup failure.
Restore Default Startup Configuration of RAS Asynchronous Media Driver
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config AsyncMac start= demand
3. Close the command window and restart the computer.
The AsyncMac service is using the asyncmac.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.