Before fixing the problem, you must understand what you are dealing with.
Modern Windows versions require all drivers to have a valid digital signature. Because many virtual MultiKey drivers are unsigned, Windows will block them by default. mastercam virtual usb multikey not working
(or use Advanced Startup) to select "Disable Driver Signature Enforcement" from the boot menu. Permanent (Test Mode) Before fixing the problem, you must understand what
: If the driver seems fine but Mastercam still won't launch, it could be a corrupt Windows User Profile . Testing with a new Windows user account can confirm this. 3D Connexion Drivers Before fixing the problem
If you are still stuck, ensure you have covered these points: