Your Java could be a problem, I believe 4.10 needs Java 1.5.
See here for updating your Java (use offline installer). Also, delete LW preferences folder (instructions in link) with LW closed.

http://www.gnutellaforums.com/showth...threadid=36420

After you've done this, just let LW sit & settle for 1/2 hour or so & see if it improves.
For your modem model & brand, just look around at all your hardware & see what you can find. It could be important info so do your best