Virtual Usb Multikey Code 39 Windows 11 Fix May 2026

Virtual USB MultiKey Error Code 39 on Windows 11 typically occurs because of a security conflict with Core Isolation (Memory Integrity)

Using devcon remove *multikey* then rescan.
Editing the registry to delete UpperFilters/LowerFilters under the device’s Enum key.
Ensuring no other HASP/Sentinel drivers (e.g., aksfridge.sys) are running.
Replacing the Multikey .sys with a version patched to support larger IRP buffers (common in v18.2.3 for x64).

If the driver file itself is corrupted, you need to clean the registry and reinstall. Uninstall the Corrupt Device Right-click Start and select Device Manager. Virtual Usb Multikey Code 39 Windows 11

A clean reinstallation can resolve issues caused by corrupted files. Remove Existing Driver : Navigate to your MultiKey installation folder and run the remove.cmd file as an administrator. Update Files Virtual USB MultiKey Error Code 39 on Windows

If it doesn't reinstall automatically, manually point Windows to your driver files by selecting Browse my computer for drivers. Using devcon remove *multikey* then rescan

Step 4 – Virtual USB Abstraction
Some advanced setups use a USB over IP redirection or a virtual machine (VM) with USB passthrough: run the dongle emulation inside a Windows 7 VM (where drivers load freely) and redirect the virtual USB device to Windows 11 via network. This bypasses native driver loading entirely.

Step-by-Step for Simple Emulation Needs:

Uninstall via Device Manager: Find the device with the yellow exclamation mark, right-click it, and select Uninstall device. Check the box for "Attempt to remove the driver for this device" if available.
- Windows 11 (64-bit)
- Compatible USB port
- Code 39 barcode scanner(s)