mastercam+x72022+virtual+usb+bus+error+39+fixed

The core issue is that Windows 10 and 11 have stricter security protocols—specifically and Driver Signature Enforcement —which block older virtual USB bus drivers from loading.

If Error 39 keeps returning, abandon the virtual bus entirely:

If the error persists, corrupted registry entries for the USB class may be to blame. Open regedit (Registry Editor).

After 14 hours of forum-diving, Marcus found a cryptic post on a Russian CNC forum (translated):

pnputil /disable-device "USB\VID_0529&PID_0001\*"