Limewire keeps poping up after I close it.
 

How do I stop it from doing that?

It's probably a virus, see point 4 here (the whole sticky is worth reading!!)
WARNING: Viruses on the network you should be aware of

Within that sticky you'll find a link to Norbiesworld. Go to the site, register & follow the directions for free computer help.

Always make sure that you're using a good AV program. Keep it updated & scan downloaded files before opening;)

I also had this problem
 

What I did to fix it was, run a system restore. I did it to two days previous. I only lost the files from that one day, and it fixed the problems.