: Go to Settings > Update & Security > Windows Security > Device Security .
Fixing the typically requires disabling the Windows Core Isolation (Memory Integrity) security feature, which often blocks the specialized drivers used for HASP keys or virtual USB emulators. Direct Solutions for Error 39 1. Disable Core Isolation (Recommended) mastercam+x72022+virtual+usb+bus+error+39+fixed
In the right pane, look for or LowerFilters and Delete them. Restart your computer. Troubleshooting Additional Causes Mastercam USB HASP issue - eMastercam.com : Go to Settings > Update & Security
Right-click the "Virtual USB Bus" or "HASP" device with the yellow exclamation mark and select . Disable Core Isolation (Recommended) In the right pane,
If the system still fails to load the driver, you may need to clear corrupted filter entries in the registry. Press Win + R , type regedit , and press Enter.
Click and toggle Memory integrity to Off . Restart your computer for changes to take effect. 2. Clean Driver Reinstallation