Windows 8 Services

Serial UART Support Library - Windows 8 Service

Serial Class Extension by Microsoft Corporation.

This service also exists in Windows 10.

Startup Type

Windows 8 edition Windows 8 Windows 8.1 Windows 8.1 Update 1
Core Manual Manual Manual
Pro Manual Manual Manual
Enterprise Manual Manual Manual

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 8 startup proceeds, but a message box is displayed informing you that the SerCx service has failed to start.


Serial UART Support Library won't start, if the Microsoft ACPIEx Driver service is stopped or disabled.

Restore Default Startup Type of Serial UART Support Library

Automated Restore

1. Select your Windows 8 release and edition, and then click on the Download button below.

2. Save the RestoreSerialUARTSupportLibraryWindows8.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.

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 8 installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.