I'm using Avast! and it's pretty good. Updates almost daily and I've heard it protects against more viruses than AVG. Worh a try I think.
the best free av i used was AVG bt i have now changed to NOD32 its worth the price!
I use BitDefender, nice romanian antivirus.
I have a little experience with dealing with malicious code and their associated anti malcode programs.
All the above mentioned free programs are good.
Avast being the best in my mind for Windows.
And FProt being the best for Linux OSs.
Although these programs are good it is well worth the money to buy a commercial product.
I personally use 'VET' by Computer Associates, and would recomend any of CAs products.
AVG is fantastic - since I began using it I have never gotten a virus.
AVG is my 1st Choice
2nd is AntiVir
i agree on avg but i must say i had a virus that got through the other day.
Just to say that no virus scanner is perfect.