I just saw the posts about a bad file that got downloaded and I wanted to say that I scan every file before playing it (when I remember!) with my anti-virus agent,which happens to be Zone Alarm Security Suite.When I right click the file on my computer one of the options with this system is " scan with zone alarm anti virus" or some such. Just takes seconds. Actually I think that the downloads are automatically scanned as I remember seeing once a notification that a file was infected as I was downloading it. This system apparently does miss some worms so I still worry a bit,but I would highly recommend this system or any other that lets you scan before playing.- cougar