See
http://www.gnutellaforums.com/showthread.php?t=65300
The normal ways to uninstall LW are 1. Start menu > Programs > LW > Uninstall. 2. Go to program folder & find uninstaller. 3. Reinstall LW, as at the beginning of installation it will uninstall the previous installation.
However, if you attempted to uninstall LW via the add/remove control panel, then you will get yourself into all types of problems. LW is not designed to be uninstalled that way & hasn't been for about 2 years.