Shoutbox

if its a worm then a worm works like this, it goes thru ur network holes to replicate itself and then goes to another user and so on replicating itself many times...deletin the subforum will only get rid of the download action but not the link itself as the worm is in ur computer..if u have a good virus protection the go on their website and look for maybe updated virus definitions..or maybe they have something about deletin the virus..

good luck