|Who knows how many is too much... I don't think their are experts in this field... but one thing is for sure, the more you have running, the slower your machine will be.|
My personal opinion is that even one is too much. I've been on the net for at least 12 years no with antivirus... just a good hardware, and software firewall, a good spyware sniffer, and a little experience on what places NOT to goto and NOT to download... never had a problem
Heck, sometimes I even think it's the antivirus people creating the viruses just to sell more product.
(Just my opinion)