When Mastercam X7 starts, it queries the system to verify the presence of a valid license. Normally, this query goes to the physical USB driver stack.

The Virtual USB Bus relies on registry entries to mimic the hardware dongle data. You must merge the specific dump data for both your Mastercam X7 license and Mastercam 2022 license into the registry path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\MultiKey\Dumps\ Locate your valid .reg license files. Right-click each file and select .

Look under "Universal Serial Bus controllers" or "Standard system devices".