RAS Asynchronous Media Driver (AsyncMac) Service Defaults in Windows 10

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 device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If RAS Asynchronous Media Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the AsyncMac service has failed to start due to the error.

Restore Default Startup Configuration for RAS Asynchronous Media Driver

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_AsyncMac_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The AsyncMac service is using the asyncmac.sys file that is located in the %WinDir%\System32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.