Windows 10 Services

Serial UART Support Library - Windows 10 Service

Serial Class Extension by Microsoft Corporation.

This service also exists in Windows 8.

Startup Type

Windows 10 version Home Pro Education Enterprise
1507 Manual Manual Manual Manual
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Default Properties

Display name:Serial UART Support Library
Service name:SerCx
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 10 startup proceeds, but a message box is displayed informing you that the SerCx service has failed to start.


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 10 edition and release, and then click on the Download button below.

2. Save the RestoreSerialUARTSupportLibraryWindows10.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. 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 10 installation media.