I had AVG anti-virus software on my computer but decided to buy Norton Anti-Virus Pro. AVG doesn't update often enough. After installing Norton, it found 7 file infections, so obviously it was a good swap out. So now I am running Norton Anti-Virus, Spy-Bot, Adaware, ZoneAlarm and I have a firewall on my Microsoft Broadband router. Do I need to run all of these products? Won't Norton do the same things that Spy-Bot and Adaware do? What's the safest configuration I can put up?