@Synnka_Atanyl Virus names with !ml (MachineLearning) mean that some dumb AI flagged it for reasons even Microsoft won't be able to tell you about. Update your definitions to the latest version and the problem will go away.
ACT version 3.6.1.276/277 is released. Attempting to reduce CPU usage for frequent encounter updates. Implemented warning/optional blocking of multiple copies of ACT. Misc fixes. advancedcombattracker.com/version.php