Popular hardware monitoring and fan controls have started being flagged as a hack tool by Windows Defender as Microsoft has flagged the WinRing0 driver as a security risk. WinRing0 is used by numerous PC utilities from popular brands and is not malicious by design but its low-level access bypasses Microsoft’s security.
OCBase, developer of OCCT, has stepped in and will be developing a security compliant driver for any developer and hardware company interested in using it.