I think norton anti-virus is probably the best, but its expensive. If you don't want that zone labs do good security and its easy to use they do a free Fire wall (which is pretty c**p) but a good choice would be to get Zone Alarm Pro or Zone alarm security suite. Hope that helps Code:
AOL Active Virus Shield (AVS) is a free antivirus utility made available by AOL. Its engine is based on the one used by Kaspersky Anti-Virus 6.