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 of USB Synopsys Controller

Before you begin doing this, make sure that all the services on which USB Synopsys Controller depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config ufxsynopsys start= demand

3. Close the command window and restart the computer.

The ufxsynopsys service is using the ufxsynopsys.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.