Same problem as this one:
http://www.gnutellaforums.com/showth...threadid=34340
Delete your LW preferences folder as described here:
Fixes for Limewire Try the 'Other' installer. You just unzip it & use it.
It might be an idea to download the installer to your computer, disconnect from the net temporarily, disable your firewall temporarily, then install LW. Then if it installs ok, re-enable everything.