I've been using NOD32 much to my satisfaction for years now. For people who don't want to pay for anti-virus protection (like my dad eg.) I always recommend Avast. Even though AVG has always seemed to be the number one choice for free anti-virus, I've always wondered how it ever earned that reputation. In my experience it slows down the PC, doesn't find a lot of common viruses and now and then even turns nasty in a very bad way. I've never know Avast to fail. Maybe next time I'll try MSE.