Arcticsid installed one antivirus program on a new PC that already had another. Then he asked the Antivirus & Security Software forum if that was a good idea.
Running two antivirus programs simultaneously is a bit like mixing a fine, vintage Cabernet with breakfast cereal. Each is good on its own right, but the combination may have unpleasant effects.
Before I explain why, let's get some definitions out of the way. The term antivirus has come to mean a program that launches when you boot your PC and stays running in memory, protecting you in real time not just from viruses (which are, technically speaking, passé), but Trojans, rootkits, and all other forms of malware.
Go to Source One antivirus program is better than two -