KAZAA

I have not tried this file-sharing program, but I know that it can really screw your PC up.

If you have installed KAZAA here is how to make it safe (well safer).

If you insist on using KAZAA (which I do not recommend) then KAZAA-LITE is much better but not guaranteed to be 100% safe.

KAZAA LITE is no longer supported, a good frontend is apparently DIETK that stops the adverts/spyware (but I have not used this).