It’s well known that some anti-virus programs are better than others at given times. Mostly because of how soon the signatures (tells that are used to identify malware) are updated. There is also a difference between their methods: some use signatures to identify the malware and some use an analysis of the behavior of the computer and the malware to identify anomalies and alert you when they’re found; and a few anti-virus programs use both methods of detection.
So, given that some are better than others at identifying malware, is it a good idea to run more than one anti-virus program for better protection? The answer is no…and maybe.