Best/Good antivirus?

[Uzi]

I'd be recommending Norton, although you may experience a couple of false-positives it's still very good.
I've been using the program for about two years now and it's never let me down, unfortunately it's not free though.
Throughout the time I've been using Norton it's protected my computer from attacks numerous times.
Give it a shot if there's a trial version available, it's worth it.