If Windows continues to block the virtual driver, you may need to disable signature checks temporarily. Run the tool. Enable Test Mode and select Sign a System File .
Use the Mastercam System Inspector to generate a report and verify if your physical or virtual dongle is being recognized correctly. 4. Bypass Driver Signature Enforcement mastercam x72022 virtual usb bus error link
Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056-444553540000} . If Windows continues to block the virtual driver,
In the right pane, find or LowerFilters . Right-click and select Delete . Restart your PC. 3. Reinstall Official Drivers mastercam x72022 virtual usb bus error link