If you do not have your scanner set to scan AS you download then you are not using all your tools. It is like defending a castle but leaving the front gate open. Additionally, it gives you a much better system of determining exactly what file(s) you may have been downloading that were infected and carriers and which ones are simply innocent victims now being blamed. It helps take the guessing out of it. All my DAZ files have checked clean, BTW. Also, with the Nimda worm on the loose, if you have not already updated you anti-virus files you are just asking for a disaster. This one is very, very nasty.