USB Synopsys Controller (ufxsynopsys) Service Defaults in Windows 10

UFX Synopsys Client Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:USB Synopsys Controller
Service name:ufxsynopsys
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ufxsynopsys

Default Behavior

USB Synopsys Controller is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If USB Synopsys Controller fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the ufxsynopsys service has failed to start due to the error.


USB Synopsys Controller cannot be started under any conditions, if the USB Function Class Extension service is disabled.

Restore Default Startup Configuration for USB Synopsys Controller

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_ufxsynopsys_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The ufxsynopsys service is using the ufxsynopsys.sys file that is located in the %WinDir%\System32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.