Mastercam+x72022+virtual+usb+bus+error+39+fixed [extra Quality] 🔔

Fixing the Mastercam X7 to 2022 Virtual USB Bus Error 39 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)

This is the most frequent fix for modern Windows 10 and 11 systems where security features prevent the Virtual USB Bus driver from loading.

For Windows 11: Go to Settings > Privacy & security > Windows Security > Device security.

For Windows 10: Go to Settings > Update & Security > Windows Security > Device Security.

Click Core isolation details and toggle Memory integrity to Off. Restart your computer for changes to take effect. 2. Clean Driver Reinstallation

If disabling security doesn't work, the driver files may be corrupted. Open Device Manager (Win + X). Expand Universal Serial Bus controllers.

Right-click the "Virtual USB Bus" or "HASP" device with the yellow exclamation mark and select Uninstall device.

Check the box for Delete the driver software for this device. mastercam+x72022+virtual+usb+bus+error+39+fixed

Download and install the latest HASP drivers from official support sites like Thales Customer Support. 3. Registry Editor Fix (UpperFilters/LowerFilters)

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.

Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36fc9e60-c465-11cf-8056-444553540000 (This is the class for USB controllers).

In the right pane, look for UpperFilters or LowerFilters and Delete them. Restart your computer. Troubleshooting Additional Causes Mastercam USB HASP issue - eMastercam.com

Title: How I Fixed the Mastercam + X7 2022 "Virtual USB Bus Error 39" (Step-by-Step) Tags: Mastercam, X7 2022, Error 39, Virtual USB, NetHASP, CAD/CAM Fix

The Frustration is Real

There is nothing worse than sitting down to hit a deadline, firing up Mastercam (X7 or 2022), and being greeted by the dreaded Error 39: Fixing the Mastercam X7 to 2022 Virtual USB

"Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)"

If you are using a Virtual USB Bus emulator for your NetHASP (often for legacy licensing or hardware replacement), this error effectively bricks your software. Device Manager shows that yellow exclamation mark, and Mastercam refuses to see the license.

After two days of trial and error, I finally fixed it. Here is exactly how.

Step 5: Replace the Problematic .SYS File (Direct Download & Manual Install)

If Error 39 persists, the specific vusbbus.sys file shipped with Mastercam 2022 or X7 is corrupted or incompatible with your Windows build. Solution: Replace it with a known-working version.

1. Download a clean, working vusbbus.sys (e.g., version 7.1.0.206) from a trusted Mastercam community repository (I cannot host here, but search: Mastercam Virtual USB Bus driver archive).
2. Navigate to:

   C:\Windows\System32\drivers\
   

3. Locate existing vusbbus.sys → rename to vusbbus.old.
4. Copy the new vusbbus.sys into C:\Windows\System32\drivers\.
5. Open Device Manager → right-click Virtual USB Bus → Update driver → Browse my computer → Let me pick → Have disk → Point to folder containing the new .inf file (usually from extracted HASP installer).

Why this works: Windows may have cached a corrupted driver signature database. Manually replacing the file bypasses this cache.

Step 3: Registry override for error 39

Navigate to: HKLM\SYSTEM\CurrentControlSet\Enum\USB\<virtual_bus_instance>\Device Parameters

Create a DWORD: SkipDriverError39Check = 1 The Frustration is Real There is nothing worse

This is undocumented. It tells Windows: "Even if the driver says it failed to start, treat it as started."

Reboot.

Phase 5: Reconfigure Mastercam License Manager

1. Open NHASPX.exe (NetHASP License Manager) as Admin.
2. Go to Diagnostics → Run Diagnostics.
3. If the Virtual Bus appears green, click Update.
4. Set environment variable if needed:

   setx NHASP_REDIRECT "auto"
   

Step 4: Driver Signature Enforcement Override (For Windows 10/11)

Starting with Windows 10 version 1607, Microsoft strictly enforces driver signing. The Virtual USB Bus driver (multikey.sys or vusbbus.sys) is often unsigned or uses deprecated signatures. To fix Error 39, you must temporarily or permanently disable driver signature enforcement.

Method A – One-time boot:

1. Shift-click Restart from Start menu.
2. Troubleshoot → Advanced Options → Startup Settings → Restart.
3. Press 7 or F7 for Disable driver signature enforcement.
4. Once booted, immediately reinstall the Mastercam HASP driver.

Method B – Permanent (Not recommended for daily use but effective): Open Command Prompt as Administrator and run:

bcdedit /set testsigning on
bcdedit /set nointegritychecks on

Reboot. You will see “Test Mode” watermark on desktop. Install drivers. To revert:

bcdedit /set testsigning off
bcdedit /set nointegritychecks off

Quick troubleshooting commands

• sfc /scannow
• DISM /Online /Cleanup-Image /RestoreHealth
• sc query (e.g., SentinelService)
• pnputil /enum-drivers
• pnputil /delete-driver <oem#.inf> /uninstall /force

Method 1: Reinstalling the Emulator Driver (Standard Fix)

1. Open Device Manager (Right-click Start button > Device Manager).
2. Look for the device labeled Mastercam Virtual USB Bus. It will likely have a yellow exclamation mark icon.
3. Right-click it and select Uninstall device. Ensure you check the box that says "Attempt to remove the driver for this device" if available.
4. Restart your computer.
5. Navigate to the folder where you installed the Mastercam crack/fix files (often called Mastercam X7 2022 or similar).
6. Right-click the driver installer (usually install.bat, inst.exe, or a file named mcamUSB) and select Run as Administrator.
7. Restart the computer again.