I run ESET Smart Security 7 right now and I love it. Not only does it work as a AV it also has a built in Firewall. If your willing to pay for an AV this is definitely the one I would recommend. It's pretty expensive at $60 a year but if your serious about security, this is the way to go. If your looking for just an AV though, ESET has one called NOD32 which is just smart security 7 without the firewall and the other extra features. NOD32 is a little cheaper at $40 a year.