Hi. I went into User Right Assignment and saw that "Log on as a service" was not "Blank" as it should be for security reasons. Someone/something had put in "NT authority/All services" into there!! STIG security warns about having anything in there and tells us to have it Blank! I want to know what made this change, my virus scanners don't find anything and I have done all scans from different antiviruses, malwarebytes hitmanpro norton 360 and more. so this is something else, maybe someone has access and do stuff in hiding?

from stig security "Unauthorized users must not have the Log on as a service User Right." "Inappropriate granting of user rights can provide system, administrative, and other high level capabilities. Accounts with the right "Log on as a service" can start network services or register a process as a service on the system."
Unauthorized users must not have the Log on as a service User Right.

Windows 10 pro x64 newest version and updates 21h2