Serial UART Support Library - Windows 11 Service
This service also exists in Windows 10 and 8.
Startup Type
| Windows 11 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 21H2 | Manual | Manual | Manual | Manual |
| 22H2 | Manual | Manual | Manual | Manual |
| 23H2 | Manual | Manual | Manual | Manual |
| 24H2 | Manual | Manual | Manual | Manual |
Default Properties
| Display name: | Serial UART Support Library |
| Service name: | SerCx |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\SerCx.sys |
| Error control: | normal |
Default Behavior
The Serial UART Support Library service is a kernel mode driver. If Serial UART Support Library fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the SerCx service has failed to start.
Dependencies
Serial UART Support Library is unable to start, if the Microsoft ACPIEx Driver service is stopped or disabled.
Restore Default Startup Type for Serial UART Support Library
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreSerialUARTSupportLibraryWindows11.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 SerCx.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.