Alcohol is apparently something that clashes.
http://www.gnutellaforums.com/genera...w-opening.html.
You could try these options:
http://www.gnutellaforums.com/333278-post2.html However use the installer you already have for LW 4, not the one in that post.
A possibility to try is create a new account, a test account, install LW there to see if it opens. That will at least tell us if the problem is account related.