This driver is frequently associated with software cracking . While the technology is useful for legitimate backup purposes (creating a digital backup of a physical key you own), downloading pre-made "Virtual USB Multikey" driver packages from random internet forums often contains malware or trojans. If you are seeing this error after downloading a "fix" for software, proceed with extreme caution regarding your system security.
If disabling Core Isolation doesn't work, you may need to completely remove and re-install the driver. Uninstall: Device Manager Virtual Usb Multikey Code 39 Windows 11
Multikey drivers (typically .sys files dated from 2005–2012) are or signed with deprecated SHA-1 certificates. Windows 11, especially on fresh installations, blocks loading such drivers via: This driver is frequently associated with software cracking