in the lastest tests f-secure fared very well, just behind KAV and Nod32, and two others, and avg was a ways down the list but not in the middle or bottom. antivir scored better actually (marginally so). but avg is still very good and will catch more of the more common virii. better than most paid av's- but yes, fsecure is very good, i use f-secure and it's been great, i would use avg or antivir if i didn't have f-secure. i think antivir has slightly better overall detection rate but i think avg is more polished and updates frequently.