I like Avast, tests show it to be just as good as mcafee and its free. I don't really like zone alarm, instead sygate is supposed to be more secure and I all around likes it better but it is much more advanced and is hard to use if you don't know what your doing. Other things that are good to have is Hijack this, ad-aware se, spybot, spyware blaster, ccleaner(cleans out registry, including bad entrees that norton couldnt get rid of when i used to have it), and microsoft anti-spyware. All this is free, and prob the best stuff you can get right now.