Once the blue menu appears, choose Troubleshoot > Advanced Options > Startup Settings > Restart. Press 7 or F7 to Disable Driver Signature Enforcement.
The "Virtual USB Bus" or "Virtual USB MultiKey" error—specifically Error Code 39 mastercam x7 2022 virtual usb bus error high quality
To resolve the Virtual USB Bus Error (often appearing as Error Code 39) in Mastercam X7 through 2022 , you typically need to Once the blue menu appears, choose Troubleshoot >