Limewire starts on it's own.
 

My computer is really slow when I'm downloading so It is difficult for me to watch videos or listen to music while limewire is on. To stop this, I turn off Lime wire when I'm not downloading or I just want to watch or listen to something. The problem is this: Everytime I shut down Lime Wire it starts up again on it's own. I exit the program and about 30 seconds later it starts up again on it's own. PLEASE HELP.

-Thanx in advance.

You probably have a worm.

Try the easy fix mentioned at the end of point 2 here, it's worked for a lot of people.
WARNING: Viruses on the network you should be aware of

If that doesn't help, there are links to help sites below
http://www.spywarewarrior.com/index.php
http://www.castlecops.com/forums.html
http://forums.spywareinfo.com/index.php?showtopic=79038