Recommend an antivirus program?



I second Microsoft Security Essentials. I used to use Avast for years, but switched to MSE a few months ago and haven't looked back. It uses less resources and it's detection rate is on Par or above ANY of the big names.
 
Had Nod32, it let in a virus
Had AVG, it let in a virus
Have had Kaspersky for 2-3 years, and never a virus

I know others who have had viruses while having up-to-date A/V. I got them to move to Kaspersky and I don't think they've had a virus since

(btw, I got viruses from browser exploits, not from being an idiot and opening attachments, etc)
 
The bottom line really comes down to you can run massive tests and no antivirus is going to be perfect every time. I use MSE because its as good as the rest, free and uses minimal resources (which is important to me) Some antivirus can double or triple your windows start up time for example.
 
Kaspersky cut down the operating speed of my computers in half. Got rid of that crap and haven't looked back. No point in paying for pain.