Unable to, it's built in. And yes they are virus ridden audio files. LW 'only' blocks such known files, not good files. Here's a sample of example file sizes to step aside of Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see) .. it's not a complete list because new ones come out now & again, but it is at least a good guide.

Also worth seeing are http://www.gnutellaforums.com/tips-t...avoidance tips and also How to find music