INTERNET EXPLORER
Click on the settings icon, then click on "Internet Options".
You will see "Browsing history". Click on the "Delete" button as shown, then confirm by clicking the "Delete" button once prompted.
CHROME
Click on the Settings icon in Chrome, then click on "History".
Click on the "Clear browsing data".
Make sure "the beginning of time" is selected from the dropdown box and that "Empty the cache" is selected, then click on the "Clear browsing data" button.
FIREFOX
Click on the "Firefox" button at the top left hand side of the browser, hover the mouse cursor over the "History" option to reveal "Clear Recent History" and click then on it.
Make sure "Everything" is selected from the dropdown box and ensure the following options are ticked. Then click on "Clear Now".