If a driver is unsigned or the signature is not verifiable, Windows will refuse to load it and display an error in Device Manager—often accompanied by a yellow exclamation mark and an error message.
bcdedit /set testsigning on
When you see while trying to use a Virtual USB Multikey on Windows 11, it usually means Windows can't load the driver because it’s either corrupted, missing, or blocked by modern security features. This is a common hurdle for legacy hardware emulators like Multikey, which often struggle with Windows 11's stricter driver requirements. Quick Fixes for Code 39
If Windows 11 still refuses to load the driver due to Virtualization-Based Security, you can turn it off via the registry. Press Win + R , type regedit , and hit Enter. Navigate to the following key: Virtual Usb Multikey Code 39 Windows 11
In many cases, this error is accompanied by additional information:
If you use software that relies on a virtual USB dongle or a , you may have encountered a frustrating yellow exclamation mark in your Device Manager accompanied by this message:
If you have a driver package that includes a (look for files like multikey.cat , multikey.inf , and MultiKey.sys in a signed folder), the process is straightforward: If a driver is unsigned or the signature
Frequent Windows updates can overwrite critical system files or tighten security policies, causing a previously working Virtual USB Multikey driver to show Code 39. Here is the recommended recovery method.
After the driver is installed, you may notice three SafeNet Inc. devices appearing under (with yellow exclamation marks). To resolve this:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Quick Fixes for Code 39 If Windows 11
This is the most common resolution for Code 39 errors with virtual drivers on Windows 11. Matsusada Precision menu and search for Windows Security Device security in the left-hand menu. Core isolation details Toggle the Memory integrity your computer to apply the changes. 2. Registry Editor Adjustment
This feature allows users to emulate multiple virtual USB keys on a single physical USB port in Windows 11, specifically designed for Code 39 barcode scanning applications.
– Open Control Panel → Uninstall a program and look for Sentinel Protection Installer . If it is absent, download and install it (version 7.6.8 works, but any recent version should be fine). This step is often overlooked but is essential for the Virtual USB Multikey to function correctly.