I have used NOD32, AVG, Norton and Mcafee.
I'm currently using AVG, its great for what it is it depends on what you need, even the features in the free edition are excellent.(I'm not using the free one)
NOD32 was really good but i remember something stuffing up and i just un installed it.
^It didn't use as much memory as the big yellow beast below.
Norton...Norton...What can i say?.. Didn't last a week on my computer. :thefinger
McAfee that was...alright, but its only alright if you want your anti virus controlling your computer :nuts:
every time something needed to access the internet "this program!!! is trying blah blah. allow, allow once block" in an annoying little box that came in front of everything.The included firewall was great and alot of the other features. AVG or Mcafee here. (depends if you want an alright FREE anti-virus or a good one that costs money)