he said, “that error means Mastercam can’t talk to its security key. But the ‘virtual USB bus’ part is a red herring. Your dongle is real, but the software thinks it should be talking through a fake, virtual USB port—like the ones VMware or VirtualBox create.”

She shook her head. “But I’m not running any virtual machines.”

She called her veteran colleague, Tom. Tom sighed—he’d seen this ghost before.

The “Virtual USB Bus error” rarely means your dongle is dead. It means Mastercam is looking at a ghost port first. Exorcise the virtual drivers, reinstall the real one, and your old CAM friend will work again—even in 2022, 2025, and beyond.