I remove ON SIGHT Kazaa from any computer I touch. It is the worst source of any malware I have ever seen. Granted it is not the program itself, but there are so many people on the P2P network infected, and spreading infected files it is not worth the hastle. It is far safer to use a torrent mechanism, as such torrents with virii are either reported or removed for having infected files; wheras this isnt possible with a P2P network.
I reiterate my distaste for Kazaa. I direct everyone I know to stay as far as they can away from any form of Kazaa, and if I ever work on a system that has Kazaa installed, I promptly remove it and go into a paranoid state in which I scan it repeatedly for virii and other malware.
STAY AWAY.