I seem to be having the same problem as other users. I get the same message when trying to delete a few songs in particular. It says, "unable to delete", "may be used by another application". I've searched my hard drive and can't find any application that is using the mp3 file. I've tried START, then FIND, and my computer can't find these files. I've tried closing LimeWire, going into my hard drive and deleting it there (as KathW keeps recommending). My computer tells me it's not allowed, that the file is in use. I've tried restarting my computer and doing it all again. Still won't delete. My last ditch attemp to rid my computer of this file is to uninstall LimeWire...which I did. Several weeks later, we install it again, only to find the same song still there!!! What is going on??? and how do I get rid of these songs???!!!! Can someone give me an answer that will work?