I use panda as my back up because I agree, sometimes one will find what the other doesn't. There are just too many out there. The online scan is my backup check. I also use separate Lavasoft Ad-Aware (free version) because it seems every few months I pick up the Coulomb dialer and nothing but Lavasoft picks it up (I know its there when I lose my internet connection every 20 minutes or so). I have kids that play a lot of online games (as do myself and my husband). My sons tend to download a lot of stuff from gamer sites so we kind of high risk around here.