Thanks Chock, I like Ad-Aware but doesn't find all trojans!

I have been using Zone Alarm for a few years now & never got a virus, ther only time is from downloading files that may have them embedded, The 2 apps recomended above are ok but I really would like to find a Virus Scan that will scan a particular folder like McAfee did.

I download always to the same folder & when I have the files, I then got McAfee to just check those files!
Any recomendations?