USB Device Emulation Support Library - Windows 11 Service
This service also exists in Windows 10.
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: | USB Device Emulation Support Library |
| Service name: | UdeCx |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\udecx.sys |
| Error control: | normal |
Default Behavior
The USB Device Emulation Support Library service is a kernel mode driver. If USB Device Emulation Support Library fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the UdeCx service has failed to start.
Restore Default Startup Type for USB Device Emulation Support Library
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreUSBDeviceEmulationSupportLibraryWindows11.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 udecx.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.