Where the heck did you get your LW from?? The ONLY place you should have got it is from here:
http://www.limewire.com/english/content/home.shtml It sounds as though your computer needs a clean up with a decent anitvirus app, ad-ware
http://www.lavasoftusa.com/software/adaware/ or/& Spy Sweeper
http://www.webroot.com/wb/downloads/index.php The normal LW sould NEVER ask such a thing unless another app/virus is masking itself over LW.