Try the various fixes in the thread below...there are different fixes to try as there seem to have been a few variations of this thing over time

2 probs (LW keeps restarting & can't access options)
http://www.gnutellaforums.com/downlo...s-options.html
Starts on its own/ options folder won't open (possible fix)
installation aborts
WARNING: Viruses on network you should be aware of!

Make sure to try AVG Free...it's been a fix for the options problem & might also help with the restarting thing. Make sure to update AVG before scanning your computer.

If you're still stuck, please go to one of these sites - they're specialists in malware removal & can help you!!
Spyware Warrior :: Index
CastleCops® » Security Forums
SpywareInfo Forum FAQ - SWI Forums
Malware Removal - MajorGeeks Support Forums

Always make sure that you're using a good AV program. Keep it updated & use it to scan ALL files that you download, BEFORE you open them!!