Avast! AntiVirus
Skinable
Auto Updates (optional)
Rest is the what every other antivirus can do.
http://www.avast.com/
AIM: FuLouZero
And Ill give you you a 1500 day serial
The best is Norton AntiVirus 2004 but its really hard to crack and cost $40 and the 10 monthly (Please tell me if im wrong). But if you asking to buy one get it.