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UCM-UCSI KMDF Class Extension - Windows 10 Service

UCM-UCSI KMDF Class Extension by Microsoft Corporation.

This service exists in Windows 10 only.

Startup Type

Windows 10 version Home Pro Education Enterprise
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Default Properties

Display name:UCM-UCSI KMDF Class Extension
Service name:UcmUcsiCx0101
Type:kernel
Path:%WinDir%\System32\Drivers\UcmUcsiCx.sys
Error control:normal
Group:System Bus Extender

Default Behavior

The UCM-UCSI KMDF Class Extension service is a kernel mode driver. If UCM-UCSI KMDF Class Extension fails to start, the error is logged. Windows 10 startup proceeds, but a message box is displayed informing you that the UcmUcsiCx0101 service has failed to start.

Restore Default Startup Type for UCM-UCSI KMDF Class Extension

Automated Restore

1. Select your Windows 10 edition and release, and then click on the Download button below.

2. Save the RestoreUCMUCSIKMDFClassExtensionWindows10.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 UcmUcsiCx.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.