Navigate to the following key (copy/paste into the regedit address bar):
Mastercam X7 was released in 2013, long before Windows 10 (2015) and Windows 11. Error 39 is for X7 users on modern OS due to:
On the , look for any of these values:
Press , type regedit , and press Enter to open the Registry Editor.
: Go to Windows Security > Device Security > Core Isolation details . Step : Toggle Memory Integrity to Off . mastercam x72022 virtual usb bus error 39 fix
Once cleanup is complete, reinstall the latest stable driver for your Mastercam version. Many users report success with driver versions from for Mastercam 2022.
If the virtual bus driver is corrupted, you must clean install the Sentinel LDK HASP driver. Open . Expand Universal Serial Bus controllers . Navigate to the following key (copy/paste into the
Navigate to the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity Find the value on the right pane. Right-click it, select Modify , and set the Value Data to 0 . Restart your PC . 3. Clear Registry Filters (UpperFilters and LowerFilters) How to Fix USB Error Code 39 In Windows 10/8/7 [Tutorial]
If disabling Memory Integrity does not resolve the issue, the virtual USB driver package itself must be completely wiped and reinstalled. Uninstall the Existing Driver Right-click the and select Device Manager . Expand the Universal Serial Bus controllers section. Step : Toggle Memory Integrity to Off
If you are running Mastercam inside a virtual machine (VM) like VMware or VirtualBox, the virtual USB controller might be misconfigured.
If you need to disable signature enforcement permanently, use the command prompt method: