Mastercam X72022 Virtual Usb Bus Error 39 Fix May 2026
Mastercam X7 was released in 2013, long before Windows 10 (2015) and Windows 11. Error 39 is extremely common for X7 users on modern OS due to:
Last Updated: October 2025
Applies to: Mastercam X7, Mastercam X9, Mastercam 2017, Mastercam 2018, Mastercam 2019, Mastercam 2020, Mastercam 2021, Mastercam 2022 (and some legacy HASP/NetHASP installs)
If you are a CNC programmer or machinist, few things are as frustrating as launching Mastercam only to be greeted by a cryptic error message:
"Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 39)" mastercam x72022 virtual usb bus error 39 fix
This error, appearing in your Device Manager under a node called "Virtual USB Bus" (often accompanied by a yellow exclamation mark), is the notorious Error 39. It completely prevents Mastercam from communicating with your HASP key (the hardware USB dongle that holds your software license).
This article will explain why this happens, the critical differences between Mastercam X7 and 2022, and provide a step-by-step master fix that works across all affected versions.
Clean registry entries (use with care)
Reinstall the virtual USB driver manually
Disable driver signature enforcement (if on Windows 10/11)
Prevent Windows from auto-updating the driver Mastercam X7 was released in 2013, long before
Mastercam does not talk directly to your USB HASP key. Instead, it installs a virtual driver called the "Virtual USB Bus." This bus acts as an interpreter: it creates a virtual pathway between your physical USB port and Mastercam’s licensing system.
When you see Code 39 in Device Manager, Windows is telling you that the driver for this virtual bus is present, but its registry entries are corrupt, incomplete, or conflicting with another driver.
Mastercam’s virtual USB bus often conflicts with: "Windows cannot start this hardware device because its
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