Don't use Kazaa. You probably now have a machine loaded to the gills with
spyware and mallware. If you really must use a P2P program, then use Kazaa
Lite which is essentially the same program but without the crap that comes
with Kazaa.
Try here:
http://www.free-web-browsers.com/remove-kazaa-ads.shtml to get a
tool to remove the Kazaa and its rubbish.
Go here:
http://www.kazaalite.com/ to get Kazaa Lite.
While you are at it, Download/install/run Ad-Aware from
http://www.lavasoftusa.com/
This will detect any spyware on your system. When you run Ad-Aware, click on
the ref update to get the latest up-to-date ref file, run Ad-Aware and
delete everything it finds.
You can also download/install/run:
Spybot - Search & Destroy from
http://security.kolla.de/index.php?lang=en&page=download
Sometimes this will find problems that are not found in Ad Aware.
This program has two entries to it (Easy and Advanced). Unless you know what
you are doing, run it in Easy mode and also select Immunize after it is run.
Make sure you read the help on this first.
Hope this helps.
Martin