Error Code 39 in Windows Device Manager means that Windows detected the driver for the Virtual USB Multikey, but it cannot load it. This usually happens for two main reasons:

The occurs when the operating system blocks the legacy emulator driver due to stricter kernel security compliance and expired digital signatures . When this happens, Windows Device Manager displays a yellow exclamation mark next to the Virtual USB MultiKey device with the message: "Windows cannot load the device driver for this hardware. The driver may be corrupted or missing (Code 39)" .

Click in the top menu bar, then choose Add legacy hardware .

Restart your PC. You will see a "Test Mode" watermark in the bottom-right corner of your desktop, indicating Windows will now load unsigned drivers. Step 3: Use the Correct 64-bit Registry Modifications

⚠️ : This step lowers system security temporarily. Do not keep test mode enabled permanently.

In the context of Sentinel HASP, refers to the HASP4 dongle’s feature set. Specifically:

Upon the next reboot, press or F7 to select Disable driver signature enforcement . Install or reinstall the Virtual USB Multikey driver. Method 3: Edit the Registry to Remove Upper/Lower Filters

Navigate to > Advanced options > Startup Settings > Restart .

A Virtual USB Multikey for Code 39 is software that emulates a USB keyboard (HID) and sends barcode data encoded in the Code 39 symbology to the active text field on Windows 11 as if typed by a physical scanner. It’s useful for testing, automated data entry, barcode-driven workflows, or when you need to inject barcode values without hardware.

Restart your PC. A "Test Mode" watermark will appear in the bottom-right corner of your desktop, indicating unsigned drivers can now load. Step 3: Install an Updated, Signed MultiKey Driver