This is annoying..
 

Everytime I exit limewire.. about 15 seconds after it closes it auto launches itself again and boots back up. How do I get this to stop?

You have a worm. If your anti virus didn't catch it go to www.norbiesworld.co.uk and he will clean it up. And update your antivrus if you havent already.

Sounds like you got yourself a virus; read here:
http://www.gnutellaforums.com/showthread.php?t=41432

You could try any of these programs (I reckon all of them) and see if you can get rid of it.
http://www.lavasoftusa.com/software/adaware/(free)

http://www.grisoft.com(good free AVG)

http://www.ewido.com(free trial which can still be used and updated after the period has ended -the best in my opinion)

http://www.ccleaner.com/download/(free)

Spybot - Search & Destroy (FREE)

If you can't get rid of it go here and get some free computer help:
http://norbiesworld.co.uk/computerhelp
:Smilywais:

I bet your Task Manager isnt working either