Ancillary Function Driver for Winsock - Windows 11 Service
Ancillary Function Driver for Winsock.
This service also exists in Windows 10, 7, 8, Vista and XP.
Startup Type
| Windows 11 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 21H2 | System | System | System | System |
| 22H2 | System | System | System | System |
| 23H2 | System | System | System | System |
| 24H2 | System | System | System | System |
Default Properties
| Display name: | Ancillary Function Driver for Winsock |
| Service name: | AFD |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\afd.sys |
| Error control: | normal |
| Group: | PNP_TDI |
Default Behavior
The Ancillary Function Driver for Winsock service is a kernel mode driver. If Ancillary Function Driver for Winsock fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the AFD service has failed to start.
Dependencies
If Ancillary Function Driver for Winsock is stopped, the following services cannot start:
Restore Default Startup Type for Ancillary Function Driver for Winsock
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreAncillaryFunctionDriverforWinsockWindows11.bat file to any folder on a local drive such as SSD or a hard disk.
3. Right-click the downloaded batch file and select Properties.
4. Check the Unblock checkbox and click OK.
5. Right-click the batch file again and select Run as administrator.
6. Restart the computer to save changes.
Note. Make sure that the afd.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 11 installation media.