Well to begin with you said you deleted the file. When you delete the file it does not uninstall LimeWire it just deletes a portion of it. You will have to reinstall it the go to add and remove programs and uninstall it.
2nd. I have a felling you may have deleted it because it kept starting up by itself all of the time . If this is the case you probably downloaded and opened a file 851.7kb in size which you found nothing in. Guess what if that is what happened there was something inside a virus that makes LimeWire start up by itself and creates 1000's of copies of itself.
If that is what happened the link below will help. If you can't get rid of it your self there is a link to Norbie's world in the link below, He will be able to help you get rid of it. And by the way this virus disables most anti virus apps so they will not detect it. And even if they do allot of them can not get rid of it.
http://www.gnutellaforums.com/showthread.php?t=41432