I think you've got a virus. Normally with this one, LW pops up all the time - just as you say your error message is doing. You've deleted LW but I suspect the virus is still alive & well.
Someone, please tell me if I'm wrong!!
Have a look at this thread, it's got lots of good advice & point 4 deals with the virus I think you've got
http://www.gnutellaforums.com/showth...threadid=41432
There's a link to norbiesworld in there too, you should go & see him... he'll be able to help you sort this out. Have you run an AV scan lately? Please make sure you've got a good, up to date AV program & scan files before you open them