It depends on what web browser you are using.
But before proceeding, make sure that you know your login information and passwords for accounts you may have stored in your browser.
In Firefox, go to the Tools pull down menu and select Clear Recent History. A requestor box will pop up, click on the Clear Now button - I have everything selected.
For Internet Explorer, go to the Tools pull down menu and select Internet Options. Now select the General tab from the requester pop up, go to the Browser history section and select the Delete button. A secondary requester pop up will appear, select various options and click on that Delete button – again I have everything selected.
Beware: that clearing everything from your cache will likely delete your login and password information for any accounts stored by your browser – so make sure you know all of your login information and passwords.