Im not sure what it's called exactly, but if you go to http://www.download.com and download AD AWARE, it will delete cookies then send information to websites that you dont know about. It's mostly Double Click and Gator on mine. The ones that are deleted will not affect normal web searching like a.net or sites like that. It's a pretty cool program. Give it a try.

Here is the direct link:
http://download.com.com/3000-2094-10121984.html?tag=lst-0-1