nilloc55,

When you deleted LW's preferences folder (as Skyliner suggested in post #4), did you also look for a folder in the old location of C:\Documents and Settings\your username\.limewire?
http://www.gnutellaforums.com/window...ng-should.html
Sometimes you can have 2 folders, if you've used older versions of LW in the past... so both folders need to be deleted.

If that doesn't help, right click on the LW desktop icon > properties > compatibility. Try running in compatibility mode for Win 2000 or NT.

Do you have Alcohol software installed? If so, look here.
LW starts then close, log: resolve_virtual_call

You could also try the advice here: FIX: LimeWire won't start or closes immediately