Mastercam X7-2022 Virtual Usb Bus Error -

Virtual USB Bus Error (often appearing as Error Code 39 ) is a common issue for Mastercam users (X7 through 2022) involving hardware-locked licenses, particularly when using

(Hardware Against Software Piracy) security keys or emulators. This error

typically indicates that Windows cannot load the device driver because it is either corrupt, missing, or blocked by system security features Common Root Causes Core Isolation/Memory Integrity:

A modern Windows security feature that blocks drivers without high-level digital signatures, often causing virtual USB bus failures. Driver Signature Enforcement:

Windows 10 and 11 strictly require digitally signed drivers. Many older virtual bus drivers used by legacy systems are unsigned and will be blocked upon system startup. Corrupt Registry Filters: Mastercam X7-2022 Virtual Usb Bus Error

Damaged entries in the Windows Registry, specifically "UpperFilters" or "LowerFilters," can prevent the USB bus from initializing correctly. Damaged User Profiles:

Repeated software crashes while multiple Mastercam instances are open can occasionally corrupt a Windows User Profile, leading to license detection failures. Google Groups Recommended Solutions 1. Disable Core Isolation (Recommended First Step)

Modern Windows security settings often conflict with virtual hardware keys. Windows Security and navigate to Device Security Core isolation details Memory integrity Restart your computer to apply the change. 2. Clear Registry UpperFilters

If the device appears in Device Manager with a yellow exclamation mark and Error 39, you may need to clear the class filters. (Registry Editor) as an administrator. Navigate to: Virtual USB Bus Error (often appearing as Error

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 UpperFilters on the right side, right-click, and select Restart your machine. 3. Bypass Driver Signature Enforcement

For older virtual drivers, you may need to boot into a mode that allows unsigned drivers. One-time fix: Restart Windows while holding , navigate to Troubleshoot > Advanced Options > Startup Settings , and select Disable driver signature enforcement Permanent workaround: Use a tool like Driver Signature Enforcement Overrider to put Windows into "Test Mode". 4. Utilize Official Diagnostic Tools

If manual fixes fail, use Mastercam’s internal utility to identify the specific licensing conflict: Download and run the System Inspector Utility Mastercam Technical Support McamInspect.exe , select your version, and click to generate a detailed report on license detection errors. Are you using a physical HASP USB key virtual/software-based emulator for your license? Virtual Usb Multikey Windows 10 Mastercam - Google Groups

5. Solutions and Workarounds

Part 3: Step-by-Step Fixes (From Simple to Aggressive)

Follow these methods in order. After each step, restart your PC and test Mastercam. If updates don't work, consider performing a clean

6. Clean Installation

Solution 4.2: Manual Driver Update via Device Manager

If the driver exists but has a yellow flag:

  1. Open Device Manager.
  2. Expand Universal Serial Bus controllers.
  3. Right-click the faulty Virtual USB Bus -> Update driver -> Browse my computer for drivers.
  4. Select Let me pick from a list of available drivers on my computer.
  5. If you see multiple versions, choose the oldest dated driver (counter-intuitively, older drivers work better for Mastercam 2019).
  6. If none appear, navigate to: C:\Program Files (x86)\Common Files\Aladdin Shared\HASP and point the installer there.

1. Executive Summary

Users of Mastercam versions X7 through 2022 have reported persistent Virtual USB Bus errors where the HASP key is not recognized, or Windows Device Manager shows an error (commonly Code 10 or Code 39) for a “Virtual USB Bus” device. This error typically occurs after Windows updates, driver conflicts, or improper installation of the HASP/License Manager. The issue prevents Mastercam from launching or operating in licensed mode. This report outlines causes, diagnostic steps, and proven solutions.

Part 1: What is the "Virtual USB Bus Error" in Technical Terms?

Before fixing the problem, you must understand the architecture.

Mastercam (X7 through 2022) relies on a licensing system from SafeNet (now Thales Group) using HASP (Hardware Against Software Piracy) or Sentinel drivers. These drivers create a virtual USB bus on your Windows system—a software layer that tricks Mastercam into thinking a physical USB dongle is always connected, even when using network licensing or specific emulation configurations.

The Error Trigger: When Windows updates its kernel, changes its driver signing policies, or when antivirus software quarantines the hardlock.sys or aksfridge.sys files, the virtual bus cannot load. Consequently, Mastercam sees "No Bus" and refuses to launch.

Affected Versions: