Different security applications usually (or often) have different naming protocols for malware found.
One of the important things in researching scan results is the original file name and full path of the detection/s.
Each file can be uploaded to
VirusTotal - Free Online Virus, Malware and URL Scanner for multiple second (about 41) opinions. In the case of a well known malicious file, or a well known false detection, the chances are high that the file has already been analysed.
If it's a false positive, the file should be submitted to AVG for further analysis. (I have no idea how diligent Grisoft are in dealing with these. I know that Avast deals with them very promptly.)
MBAM, like all the others, sometimes produces a false detection. For it to have detected 6 malware files is highly suspicious. I would take these detections seriously. MBAM is best run in normal mode.
As an aside, I've had to format and re-install Windows once since I've had it in 5 years. The reason? I foolishly re-installed my HP printer software ('coz it was borked) and that over-wrote some more recent Windows updates, borking the .net framework and Windows update status.