You can't run Norton and McAfee at the same time, not sure about AVG.
We have McAfee, Spybot, Giant, and Adaware runny at all times. A modum with a firewall, a router with a firwall and MSxp with the firewall.
Norton didn't find somthing I was seaarching for on the computer so I put on McAfee and just never redid the Norton thing. But I like Norton better.
Katz