(Delete the same files if found).
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity Microsoft Learn 4. Reinstall Virtual USB Drivers mastercam x72022 virtual usb bus error 39 fix
This must be repeated after every Windows update or major reboot. For a permanent fix, see Fix 7 (Test Mode). (Delete the same files if found)
Corrupted "UpperFilters" or "LowerFilters" can block USB device drivers from starting. , and press Navigate to: right-click and Delete them .
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity Delete Registry UpperFilters/LowerFilters
: In the right-hand pane, look for UpperFilters or LowerFilters . If they exist, right-click and Delete them .