Mastercam X72022 Virtual Usb Bus Error 39 Updated <PREMIUM · 2025>

If you have tried all four methods above—including the updated universal driver, hidden device cleanup, and driver signature bypass—and you still see Virtual USB Bus Error 39, you may be facing hardware failure.

Hardware failure signs:

What to do:

Before we fix the problem, it helps to know why it happens.

The Mastercam Virtual USB Bus is a kernel-mode driver that allows the NetHASP (hardware key) to communicate with Mastercam via USB. Error 39 explicitly states that Windows has identified the device, but the driver is either corrupted, blocked, or incompatible. mastercam x72022 virtual usb bus error 39 updated

Since Mastercam X7 uses unsigned drivers, you must tell Windows to allow them. This is a one-time boot configuration.

For Windows 10/11:

pnputil /delete-driver oemXX.inf /uninstall /force
pnputil /add-driver "C:\Mastercam\Drivers\mastercam_usb.inf" /install

SET DEVMGR_SHOW_NONPRESENT_DEVICES=1
devmgmt.msc

Error 39 (Windows Code 39) usually means:

“Windows cannot load the device driver for this hardware. The driver may be corrupted or missing.” If you have tried all four methods above—including

After a Mastercam update or Windows update, the Virtual USB Bus (often part of a license dongle driver, like HASP/Sentinel) can break.

Quick fixes:

After rebooting with Driver Signature Enforcement disabled:

Do not use the driver from your original Mastercam X7 DVD. They are too old. Use the community-approved version. What to do:

For Mastercam X7 & X9 (HASP):

For Mastercam 2022 (CodeMeter):

Crucial Update (2025): Do NOT use the "AutoDetect" drivers from Wibu Systems for X7. They will trigger Error 39. Stick to SafeNet v7.90 – [Link to official SafeNet archive on Gemalto support].

For users attempting to run older versions of Mastercam on newer hardware, Error 39 is the "Blue Screen of Death" for the licensing system. It indicates that the Windows Registry is corrupt regarding the virtual USB bus driver—the component that emulates a hardware lock (HASP) so the software can run.

Without this fix, the software is essentially a paperweight. It will crash upon startup or refuse to recognize the license, rendering the expensive CAM suite useless.