Windows defender now detects #FanControl, well regarded Windows application, as malicious. While Fan Control isn't malicious per se, since it uses #WinRing0 driver, it will allow any user level app to gain privileged access to the system as NT AUTHORITY\SYSTEM. Fan Control needs to find a way to access the registers by other means.

https://nvd.nist.gov/vuln/detail/cve-2020-14979

The security issue with WinRing0 is explained in layman’s terms by Gamers Nexus & Level1 Techs in this video: https://www.youtube.com/watch?v=H_O5JtBqODA
Insecure Code vs. the Entire RGB Industry | WinRing 0 Driver, ft. Wendell of Level1 Techs

YouTube