Reboot.
: These usually indicate that Windows blocked the driver because it is not digitally signed. Verify that Test Mode is active (you should see a watermark in the bottom-right of your desktop). Virtual Usb Multikey Driver Windows 11
Installing these drivers on Windows 11 64-bit is more complex than standard software because they are often unsigned, which triggers Windows security features. Virtual Usb Multikey Driver Windows 10 - Google Groups Reboot