Sadly, this is more a lesson about KAZAA. If you uninstall KAZAA and it's SPYWARE with the help of http://www.pem.cam.ac.uk/IT/room-connection/kazaa.html then follow up with use of parasite detection and removal tools like Adaware, Spybot and a web based virus usually returns the machine to normal.

Its unlikely that you'll find KAZAA support here since it creates more system problems and causes posts like yours.

Bob