Cookies are a small piece of text data saved to your computer by a website or web browser. Which contains informations about the things you did in the internet in past. Cookies are also use to login to a website. Like when you login to your mail at gmail , yahoo , msn , orkut or others they leave a small piece of information on your computer after you wrote the correct username and password in the login area of the websites. And The secrets datas of yours like mails are send to your computer only if the cookies have correct information. But using the cookies some websites like search engines trace your activity in internet which may violate your privacy in internet. For example you might have noticed whenever you perform a search from www.bing.com it also shows the search history of yours in side. so If you want to be secure in internet then you might want to delete the cookies from your computer to do that you need to delete all the files from the place in your computer specified below: 1. c: documents and settings your computer username cookies and delete all the files from here also: 2. c:documents and settingsyour usernamelocal settingstemporary internet files you can replace "c:" any other drives if you have installed your windows operating system in any other drive.