Mastercam+x72022+virtual+usb+bus+error+39+fixed -

Important: Back up system restore point and export registry keys you modify.

A. Restart and simple checks

B. Reinstall/repair license drivers (Vendor-specific)

Examples:

  • Wibu CodeMeter:

    • C. Remove corrupted drivers and reinstall

    D. Repair Windows driver store and system files

  • Reboot and check device.

    • E. Check and clean registry filter drivers (UpperFilters/LowerFilters)

    F. Reinstall Mastercam license components

    G. Check services and permissions

    H. Antivirus/Driver signature enforcement

    I. If driver files exist but get blocked by Windows driver store corruption

    J. Reinstallation of Windows USB Controller drivers

    K. Last resorts

    Mastercam X7 launches again, sees the virtual dongle, no error 39.
    You waste 3–4 hours, curse Autodesk (even though this is Mastercam – that’s the spirit), and eventually get back to programming parts.

    If you need the exact file links or a ready-to-run batch script that automates steps 1–5, let me know.

    How to Fix Mastercam Virtual USB Bus Error Code 39 (X7–2022) Encountering the Virtual USB Bus Error 39

    in Mastercam (X7 through 2022 versions) can bring your production to a standstill. This error typically signifies that Windows cannot load the device driver because it is either corrupted or missing. Frequently, it is caused by modern Windows security features or registry conflicts.

    Below is a comprehensive guide to resolving this error and getting your HASP back online. 1. Disable Core Isolation (Memory Integrity)

    The most common cause of Error 39 on Windows 10 and 11 is a security feature called Core Isolation

    . This feature often blocks older or virtual drivers from loading. Open Windows Security Privacy & Security (Windows 11) or Update & Security (Windows 10). Navigate to Device Security Windows Security Device Security Modify Core Isolation : Click on Core isolation details Turn Off Memory Integrity : Toggle the switch for Memory integrity Restart Your PC : You must reboot for these changes to take effect. 2. Delete Registry UpperFilters and LowerFilters

    If the error persists, there may be corrupted registry entries in the USB controller class that prevent drivers from initializing. , and hit Enter to open the Registry Editor Navigate to the following path:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 In the right-side pane, look for UpperFilters LowerFilters Right-click and these values. Restart your computer to allow Windows to rebuild these filters. 3. Reinstall Virtual USB MultiKey Drivers

    In some cases, the virtual bus driver itself needs a fresh installation or an updated file set to match modern Windows security standards. Remove Existing Drivers

    : Go to your Mastercam installation or MultiKey folder and run the remove.cmd remove.bat file as an administrator. Update Driver Files : Some users find success by replacing older

    files in the MultiKey folder with updated versions designed for Windows 10/11. install.cmd

    file as an administrator. When the Windows Security prompt appears, select Install this driver software anyway 4. Advanced Troubleshooting Tips Change USB Ports

    : Sometimes simply moving the physical HASP to a different USB port can trigger a driver refresh. Disable Hypervisor-Enforced Code Integrity : In the Registry Editor, navigate to

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity and set the Check Antivirus mastercam+x72022+virtual+usb+bus+error+39+fixed

    : Ensure your antivirus software isn't quarantining critical Mastercam or HASP driver files.

    For more specific driver downloads, always refer to official sources like the Sentinel/SafeNet Support Page or contact your Mastercam Reseller for verified driver packages. Are you using a physical HASP virtual emulator , and did you recently install any Windows Updates Mastercam X7-2022 Virtual Usb Bus Error 39 - Google Groups

    In Mastercam (X7 through 2022 versions), Virtual USB Bus Error 39

    is a common driver-related issue that prevents the software from verifying its hardware security key (HASP)

    . This error typically indicates that Windows cannot load the device driver because it is either corrupted, missing, or blocked by modern security features. Core Causes Core Isolation (Memory Integrity):

    This is the most frequent cause on Windows 10 and 11. This security feature blocks older drivers that don't meet modern memory safety standards. Corrupt Registry Entries:

    Invalid "UpperFilters" or "LowerFilters" in the Windows Registry can prevent the USB bus from communicating with the driver. Driver Incompatibility:

    Legacy Mastercam versions (like X7) use older Virtual USB MultiKey drivers that are often flagged as unsigned or incompatible by newer Windows updates. Step-by-Step Fixes 1. Disable Core Isolation (Most Effective)

    Since many Mastercam drivers are older, disabling this Windows security feature often resolves the block immediately. Windows Security via the Start menu. Navigate to Device security Core isolation details Memory integrity your computer for changes to take effect. 2. Modify the Windows Registry

    If disabling Core Isolation fails, you may need to clear corrupted filter entries. Back up your registry before proceeding. , and run as Administrator. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ Locate the USB class folder: 36FC9E60-C465-11CF-8056-444553540000 In the right pane, find UpperFilters , right-click it, and select 3. Reinstall Virtual USB MultiKey Drivers

    For older Mastercam versions (X7–X9), the virtual bus itself may need a "clean" reinstallation. Device Manager

    and find the "Virtual USB MultiKey" with the yellow exclamation mark. Right-click and select Uninstall device remove.bat

    (or similar) file from your Mastercam installation folder to clear old driver fragments. install.bat

    as an Administrator to reinstall the updated 64-bit drivers. Advanced Troubleshooting

    If the steps above do not work, consider these alternative solutions reported by the community: Mastercam X7-2022 Virtual Usb Bus Error 39 - Google Groups 24 Jul 2024 —

    Addressing the Virtual USB Bus Error 39 in Mastercam (spanning versions from X7 to 2022) requires understanding the conflict between legacy hardware security drivers and modern Windows security features. This error typically occurs because Windows prevents the loading of the virtual bus driver, flagging it as corrupted or digitally untrusted. The Core Conflict: Driver Integrity vs. Security

    The "Code 39" error specifically indicates that Windows cannot load the device driver for this hardware because the driver may be corrupted or missing. In the context of Mastercam’s virtual USB bus, this is often a false positive triggered by Core Isolation and Memory Integrity features in Windows 10 and 11. These security layers block drivers that do not meet strict modern signing requirements, which is common for the third-party virtual bus drivers used to emulate HASP or USB keys. Essential Steps to Fix Error 39

    Disable Core Isolation (Memory Integrity)This is the most frequent and effective resolution. Open the Windows Security app. Navigate to Device Security > Core isolation details. Toggle Memory integrity to Off. Restart your computer for changes to take effect.

    Registry Repair (UpperFilters/LowerFilters)If the error persists, corrupted registry entries for the USB class may be to blame. Open regedit (Registry Editor).

    Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000.

    Locate and delete the UpperFilters and LowerFilters values in the right pane. Restart the machine.

    Driver Reinstallation and Port ManagementLegacy software like Mastercam X7 may require a specific driver handshake.

    Uninstall the existing Aladdin/HASP USB drivers from the Device Manager.

    Download and install the latest Sentinel HASP LDK Runtime from the official developer site.

    Try connecting the physical USB key (if applicable) to a different port, ideally a USB 2.0 port, as some older virtual bus drivers struggle with USB 3.0/3.1 controllers. Summary of Impact

    By disabling Memory Integrity, you allow Windows to load the specific virtual bus driver required for Mastercam's license validation. While this slightly reduces the system's defense against sophisticated malware, it is often the only way to maintain compatibility with legacy industrial software that relies on virtualized USB hardware. Mastercam X7-2022 Virtual Usb Bus Error 39 - Google Groups

    While there isn't a single formal academic "paper" on this specific error, the Virtual USB Bus Error 39 in Mastercam (often occurring in versions like X7 through 2022) is a well-documented driver signature and registry issue. It typically happens when the operating system (usually Windows 10 or 11) blocks the virtual USB emulator driver because it lacks a valid digital signature or has corrupted registry entries. Understanding the "Error 39" Important: Back up system restore point and export

    The Windows Device Manager reports Error 39 when it "cannot load the device driver for this hardware... the driver may be corrupted or missing." In the context of Mastercam emulators, this usually means Core Isolation or Windows Driver Signature Enforcement is blocking the unsigned virtual bus. Step-by-Step Fixes

    Based on common technical resolutions, here is how this is typically fixed:

    Disable Memory Integrity (Core Isolation): This is the most common culprit in newer Windows versions.

    Go to Windows Security > Device Security > Core isolation details. Toggle Memory integrity to Off. Restart your computer.

    Disable Driver Signature Enforcement: If the driver is unsigned, Windows will block it by default. Hold Shift while clicking Restart.

    Navigate to Troubleshoot > Advanced options > Startup Settings > Restart. Press 7 or F7 to "Disable driver signature enforcement." Registry UpperFilters/LowerFilters Removal:

    Open regedit and navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000. Look for UpperFilters or LowerFilters in the right pane.

    Delete these entries and restart. (Warning: Back up your registry first).

    Update the Virtual Bus Driver: Manually point the Device Manager to the mcamusb.inf file found within your Mastercam installation directory or the specific emulator folder to "Update Driver." Community Insights

    Technical users often find that Windows updates silently re-enable security features that break these virtual drivers.

    "The issue is almost always Windows 10/11 security. If you don't turn off Memory Integrity in the Windows Defender settings, the virtual bus will never start, no matter how many times you reinstall it."

    "Check your Device Manager. If you see the yellow triangle with Error 39, it's a signature issue. Disabling driver enforcement during boot usually clears it right up."

    The "Code 39" error for the Mastercam Virtual USB Bus (often associated with MultiKey or HASP emulators) typically indicates that Windows cannot load the driver because it is either corrupted, missing, or blocked by security features. This issue is common in Windows 10 and 11 environments due to increased security around unsigned or third-party drivers. Primary Cause: Core Isolation (Memory Integrity)

    The most frequent cause of Code 39 for virtual drivers in modern Windows is Core Isolation , specifically the Memory Integrity

    setting. This feature prevents drivers that do not meet strict security standards from loading. Matsusada Precision How to Fix Windows Security from the Start menu. Navigate to Device Security Core isolation details Memory integrity Restart your computer to apply the changes. Matsusada Precision Alternative Solution: Registry Modification

    If the error persists or you cannot access security settings, you can manually disable the integrity check via the Registry Editor. Registry Path

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity : Find the value and set it to Legacy Fix : Some users resolve Code 39 by deleting UpperFilters LowerFilters

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 if they exist. Driver Reinstallation Steps

    Virtual USB Bus Error 39 in Mastercam versions (including X7 through 2022)

    typically occurs because Windows security features or registry conflicts prevent the emulator drivers from loading properly Matsusada Precision Primary Fix: Disable Memory Integrity (Core Isolation)

    Modern Windows versions (10 and 11) include a security feature called Core Isolation

    that often blocks virtual USB drivers used by older software emulators. Start Menu and search for Windows Security Navigate to Device security Core isolation details Toggle the Memory integrity your computer. Secondary Fix: Registry Filter Deletion

    If the driver is flagged as corrupted despite being installed correctly, you may need to clear "UpperFilters" from the registry. , and run as Administrator Navigate to the following path:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\36FC9E60-C465-11CF-8056-444553540000 In the right pane, look for UpperFilters . Right-click and select your system. Driver Refresh Steps

    If the error persists after the steps above, a clean driver install is necessary: Uninstall Existing Drivers Device Manager

    , right-click the "Virtual USB Bus" (often under System Devices or Universal Serial Bus controllers) with the yellow exclamation mark, and select Uninstall device Driver Signature Enforcement

    : If you are using an unsigned emulator driver, you must boot Windows into Disable Driver Signature Enforcement mode to allow it to load. Reinstall Sentinel/HASP : Use the official Sentinel HASP LDK Runtime Examples:

    to ensure the physical or base virtual components are current. Google Groups permanently? Mastercam X7-2022 Virtual Usb Bus Error 39 - Google Groups

    Error 39 is a Windows kernel-level PnP (Plug and Play) error. It doesn't mean "license expired." It means: Windows sees a device (virtual or physical), loads a driver, but the driver tells the OS, "I can't start. Something is wrong with the hardware or its configuration."

    In Mastercam's case, the "hardware" was a virtual USB bus—a software-emulated USB controller created by the license manager (typically SafeNet / Sentinel HASP). The physical USB dongle plugged into a real port, but the HASP driver created a virtual bus inside Windows, then mounted the dongle's cryptographic keys on that bus.

    Why?

    After the Windows 11 update (or a Windows 10 22H2 cumulative update), Microsoft tightened driver signature enforcement and changed how USBHUB.SYS and Winusb.sys interact with virtual root hubs. The HASP driver—signed with a SHA-1 certificate from 2012—was now considered "untrustworthy."

    Windows loaded it but refused to start the virtual bus device. Error 39.

    Error 39 is not a hardware failure; it is a Windows driver policy conflict. While Mastercam 2022 is technically compatible with Windows 11, its legacy Virtual USB Bus driver is not. By forcing the driver through disabled signature enforcement and scrubbing corrupted registry filters, you can restore full functionality.

    If you’ve followed this 2000-word guide and still see the yellow bang, your only recourse is to either downgrade to Windows 10 21H2 (and block updates permanently) or upgrade to Mastercam 2024 (which uses a newer licensing system). However, for 95% of users, the steps above will bring your CNC workstation back to life.

    Have you fixed your Error 39? Share which step worked for you in the comments below. Keep making chips.

    Disclaimer: This guide is for troubleshooting legacy licensed software. Always ensure you are compliant with Mastercam’s EULA regarding virtual devices.

    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.

    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

    Error 39 is a Windows operating system error (CM_PROB_DRIVER_FAILED_LOAD). It occurs when:

    In the context of Mastercam’s Virtual USB Bus (used by cracked or old-license emulators as well as legitimate network license managers), the driver file is typically vusbbus.sys or multikey.sys. Windows now treats these as security risks, responding with Code 39.

    Note: This article addresses technical troubleshooting for legacy systems. Ensure you own a valid Mastercam license. Using cracked software violates copyright laws. This guide is for repairing legitimate installations where the Virtual USB Bus is part of an official NetHASP setup.

    This write-up analyzes the issue described by the query "mastercam x7 2022 virtual usb bus error 39 fixed" — i.e., Virtual USB Bus error 39 when using Mastercam X7 (or Mastercam 2022/X7-era) — and provides causes, diagnosis steps, fixes (software and Windows-level), prevention, and references for further troubleshooting.

    Do not jump straight into registry editing. First, perform these quick checks:

    If these steps do not resolve Error 39, move to the advanced fixes below.