I know of a guy who collects malware of all types and recently asked Avira if they'd like his list. (4000+ files) They said no, they have too many people sending in files. Can you believe that? A company that makes an AV product isn't interested in adding everything they can... And no offense, but I think those that don't run AV because "I know what I'm doing", are just deluding themselves. Saying something like "After you've been hit by enough virii, you know how to handle them" is a bit silly. The concept is to not get a virus in the first place! I've yet to have my system infected thanks to AV. I stopped using Norton probably five years ago because it just kept getting more and more bloated and hogging up too many system resources. It's also a nightmare to try and get it off your system. I'm currently running Comodo Internet Security, which is amazingly lightweight as far as resources go. It's also free! It has the Comodo firewall which is one of the top rated software firewalls, (free or paid...) as well as Defense+ which is a Host Intrusion Protection System. The HIPS is really solid. Comodo has always been of the opinion that prevention is the most powerful line of defense, which is why they focused on the firewall and HIPS before starting the AV. Their AV is the weakest link of CIS. It's getting better all the time, but it's still fairly young so it's database isn't quite as developed as many of the AV solutions that have been around longer. The latest version also adds buffer overflow protection. I'm not aware of any other security product doing that yet.