Mastercam+x72022+virtual+usb+bus+error+39+fixed ((top)) -

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 In the right pane, look for UpperFilters . Right-click and select your system. Driver Refresh Steps

(That VID/PID is the virtual bus signature.) mastercam+x72022+virtual+usb+bus+error+39+fixed