If you are using a virtual simulator (commonly searched as "virtual usb bus" or "NetHASP"), the Error 39 often stems from the emulator software itself conflicting with the actual Sentinel drivers.
If disabling Core Isolation doesn't work, corrupted registry "filters" might be blocking the driver. Press , type regedit , and hit Enter.
A in Mastercam X7 (or any software using a virtual USB dongle, like the 2022 version of the HASP/SafeNet emulator) usually means Windows cannot load the virtual device driver because its registry entries are corrupted or another driver is conflicting.