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The Virtual USB Bus Link is a software-based driver system that allows Mastercam to emulate a virtual USB device on your computer. This virtual USB bus creates a simulated hardware environment that interacts with Mastercam's licensing system, enabling the software to communicate with license validation mechanisms without requiring a physical USB dongle always connected to your machine.

The virtual USB bus link operates at a very low level within Windows, but its performance impact is generally minimal. The driver consumes negligible CPU resources and memory, typically less than 1 MB of RAM. However, compatibility issues can create significant performance problems, including: mastercam x72022 virtual usb bus link