Internet Explorer 9.x

1. Select Tools > Safety > Delete browsing history...
2. Make sure to uncheck Preserve Favorites website data and check both Temporary Internet Files and Cookies then click Delete.
3. You will get a confirmation at the bottom of the window once it has successfully cleared your cache and cookies.

Internet Explorer 8.x

1. Within IE, go to Tools › Internet Options.
2. Click on the General tab and then click the Delete... button.
3. Check only the Delete cookies button.
4. Click the Delete checkbox.

Internet Explorer 7.x

1. Within IE, go to Tools › Internet Options.
2. Click on the General tab and then click the Delete... button.
3. Click the Delete cookies button.
4. Click the Yes button.
5. Then click the Close button, followed by the OK button.

Internet Explorer 6.x

1. Within IE, go to Tools › Internet Options.
2. Click Delete Cookies.
3. Click OK.