Comment by jeroenhd

> Whether or not you play any games with kernel-level anti-cheat, you probably have cpu-z installed.

The problem with these is actually worse. Any program with the necessary permissions can load these drivers. Some malware likes to ship known-vulnerable drivers with one of their later stages to get kernel code execution, and Microsoft doesn't want to revoke the signatures of this malware because applications and hardware will stop working.

You don't nee CPU-Z to be installed, you just need to run a program that decided to bundle the (old) CPU-Z driver.