I think you need about 6 security software plus hardware firewall before you can start to feel safe. Not 100% safe of course but quite safe. Anything less then 3-4 is just asking for trouble. I'm talking only about programs run all the time in real time, not on demand of course. Otherwise I think 10+ is the category most people will end up in. Also I don't mean necessarily all the software you are running in real time, but the minimum number you are willing to run and still play safe. How do you test this? Say you normally run NOD32 + Regdefend + Appdefend + Online Armor + Look n stop. Turn off Say Online Armor for 15 minutes. See how uncomfortable you feel. If you feel very uneasy, and can't wait for the 15 minutes to be up so you can turn it back on, it shows you feel safe only with the full set above. Alternatively imagine if you turned say Regdefend off, and forgot to turn it back on. How do you think you will feel when you discover this? Anxious? Paranoid? Run a full security check because your registry was left unprotected (except for OA of course)?