Note: This is a diagnostic step, not a permanent solution.
Navigate to the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 In the right pane, locate and LowerFilters . Right-click and Delete these values. Restart your PC . 3. Update or Reinstall Virtual USB Drivers Mastercam X7-2022 Virtual Usb Bus Error 39