Mastercam Virtual Usb - Multikey Not Working

Refresh Device Manager to ensure the device reappears without a yellow warning triangle. Step 4: Correct Registry Permissions and Entries

I’m on Windows 10/11 (specify your OS) and using Mastercam [version]. The Multikey device shows up in Device Manager, but with a yellow exclamation or as “HASP Key not found.” mastercam virtual usb multikey not working

If Test Mode alone doesn't work, you can manually "sign" the file using a third-party tool: Refresh Device Manager to ensure the device reappears

Ensure your multikey.reg file is properly merged into the registry. The registry file must match your specific Mastercam version and license features. If you have recently upgraded Mastercam (e.g., from 2023 to 2025), you may need a new registry file. from 2023 to 2025)

Follow these steps in order.

These require different .reg files and driver sets.