There's a neat little piece of software called "window washer" that I have been using for almost a year now. It cleans your cookies, browser, history and anything else you can think of with just once click of your mouse.

Go to CNET.com and click on downloads. When you get there, search for "window washer" and you will be directed to the site where you can download it from. It's free to try for 30 days but send me a pm and I'll tell you how to run it forever and what options to check to make your computer squeaky clean

I used this software on my mom's 2 year old computer because she said it was just running too slow. She had never cleaned out her cookies, etc and when I ran window washer, it took almost 2 hours to clear out old garbage, but when we got done, we had recovered 900 megabytes on her hard drive and it ran as fast as it did when she first bought it