UCM-UCSI KMDF Class Extension by Microsoft Corporation.
This service also exists in Windows 11.
Windows 10 version | Home | Pro | Education | Enterprise |
---|---|---|---|---|
1507 | not exists | not exists | not exists | not exists |
1511 | not exists | not exists | not exists | not exists |
1607 | not exists | not exists | not exists | not exists |
1703 | not exists | not exists | not exists | not exists |
1709 | not exists | not exists | not exists | not exists |
1803 | not exists | not exists | not exists | not exists |
1809 | Manual | Manual | Manual | Manual |
1903 | Manual | Manual | Manual | Manual |
1909 | Manual | Manual | Manual | Manual |
2004 | Manual | Manual | Manual | Manual |
20H2 | Manual | Manual | Manual | Manual |
21H1 | Manual | Manual | Manual | Manual |
21H2 | Manual | Manual | Manual | Manual |
22H2 | Manual | Manual | Manual | Manual |
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 |
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.
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.