Check out KazaaLite for a supposed Ad/Spyware free version of kazaa. As far as the full version of Kazaa being loaded with such applications, its almost a sure bet that there are a few pieces of adware or spyware that install along with Kazaa. To track down what might already be installed, download Ad-Aware and run a scan of your system to find out what is already there, you might be quite suprised.