Which version of Java were you running when LW was running fine?
Which version of Java are you running now? Are there any other versions of Java installed?
Was there any system or other program installations or updates you did just before this issue started happening?
Try these things:
1. Run this utility to clean your registry:
Crap Cleaner
2.
Tip: Purge the Downloads Queue! (click on blue link)
3. Defragment your drives. Make sure they are no more than 75% full if possible.
If still no good, can you post these details:
System details - help us to help you (click on blue link)
BTW do a search of your computer, see if there's any other LW's on there.
Oh & this was was what i was trying to suggest before:
still no luck but getting closer - Gnutella Forums