The data transfer hit 99%. The screen froze.

Windows 11 requires all kernel-mode drivers to be digitally signed by a trusted certificate authority.

Microsoft maintains a list of known vulnerable drivers that are banned from loading. Older versions of multikey.sys (and similar emulators) are often included in this blocklist because they expose kernel-level vulnerabilities that malware can exploit to escalate privileges.

The fans spun down to silence.

: Commonly utilized for engineering, CAD/CAM (e.g., Mastercam, SolidCAM), and structural analysis software (e.g., MIDAS Civil) that originally shipped with hardware keys.