Internet Explorer 8 and above
From the Safety menu in the upper right, click Delete Browsing History.
Deselect Preserve Favorites website data, and select Temporary Internet files, Cookies, and History.
Internet Explorer 7
From the Tools menu in the upper right, select Internet Options.
Under "Browsing history", click Delete.
To delete your cache, click Delete files.
To delete your cookies, click Delete cookies.
To delete your history, click Delete history.
Click Close, and then click OK to exit.