Virtual USB MultiKey Code 39 error on Windows 11 typically occurs because the system's security features, such as Core Isolation (Memory Integrity) , block the older emulated driver from loading
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. Virtual Usb Multikey Code 39 Windows 11
Windows 11's "Memory Integrity" feature often blocks the MultiKey driver because it uses older, unsigned, or non-HVCI-compliant code. How to Fix USB Driver Error Code 39 - Matsusada Precision Virtual USB MultiKey Code 39 error on Windows