This is where the term "Virtual USB Bus" enters the conversation.
You might ask: Why can't Mastercam just use a standard Windows USB driver? mastercam x72022 virtual usb bus
Windows blocks unsigned kernel-mode drivers by default. You must place Windows into Test Mode to allow the Virtual USB Bus to load. Open Command Prompt as . Execute the following command: bcdedit /set testsigning on This is where the term "Virtual USB Bus"