Surely, you’ve surfed on a lot of websites. And maybe you don’t want anyone to see where you’ve been going to. It is actually good practice to clean your website history to create space and to protect your privacy from other others. For privacy reasons, if you share a computer or bring your computer to public places, you should remove your browsing history so that others may not find personal information, such as credit card information or saved website log-in information. Typically, when you enter your username and password into a website, such as your e-mail, it saves your log-in credentials, making it easy for someone to view your e-mail with easy access to your computer.
In Internet Explorer 6, you go to Tools – > Internet Options -> Clear History
In Internet Explorer 7, you go to Tools -> Delete Browsing History
You should clean your browsing history in IE at least every few months. This will ensure your computer is safer to potential hackers.