Trojan.Agent refers to a generic Trojan malware detection. It is used for detections that are either associated with no specific malware families or not enough information is available to pinpoint the malware family.
Trojan.FakeMS is a generic detection for Trojans that try to pose as legitimate Microsoft files.
Malwarebytes can remove this Trojan without user interaction. Make sure that files associated with Microsoft programs are the latest copies by updating software regularly.