__hot__ | Mastercam+x72022+virtual+usb+bus+error+39+fixed
Virtual USB Bus Error 39 in Mastercam versions (including X7 through 2022)
For Mastercam versions like X7 up to 2022, ensuring you have the latest Sentinel HASP LDK drivers from the official Thales/SafeNet support site can resolve compatibility issues that older virtual keys might trigger. Mastercam X7-2022 Virtual Usb Bus Error 39 - Google Groups mastercam+x72022+virtual+usb+bus+error+39+fixed
- Temporarily disable security software and test.
- If driver is unsigned and Windows blocks it, you may need to enable test signing (not recommended) or obtain a signed driver from vendor.
2. Disable driver signature enforcement (critical for old X7 drivers)
- Shift + Restart → Troubleshoot → Advanced Options → Startup Settings → Restart
- Press 7 or F7 for “Disable driver signature enforcement”
- Boot normally
: Ensure your antivirus software isn't quarantining critical Mastercam or HASP driver files. Virtual USB Bus Error 39 in Mastercam versions
There is nothing worse than sitting down to hit a deadline, firing up Mastercam (X7 or 2022), and being greeted by the dreaded Error 39: Temporarily disable security software and test
If disabling Core Isolation doesn't work, you may need to clear corrupted filters in the Registry.
(Invoking related search suggestions now.)
- Open regedit and navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ClassGUID where GUID corresponds to the device class (often USB or the vendor class). The exact class GUID depends on device; look at Device Manager → Details → Class GUID.
- If UpperFilters or LowerFilters entries reference the vendor filter driver that may be corrupt, export the key then delete the UpperFilters/LowerFilters values.
- Reboot. Reinstall driver if needed.
