I think that Kaspersky is the best AV. It has over 1 million malware definitions, offers complete protection and barely affects system resources. Definitely worth it but a bit pricey. If your tight on cash, get BitDefender. It is almost as good for $25 one year subscription. I made a poll to help you out ;)
Edit:
That feature is on many Anti Viruses except it is mostly listed under parental controls. You could accomplish the same thing by restricting yourself.
Last edited by Twinkie; 09-17-2008 at 11:23 PM. Reason: Automerged Doublepost

Get bitdefender its cheap 24.95 for 3 PCS right a coupon.
Avast all the way!