Your computer's history is also known as your computer's cache.

Why do I need to do that?
Whenever you browse the internet, you leave clues about yourself and what sites you've been visiting. Other people can find these clues if you have not cleared your cache [history] or cookies. 

How to clear your cache in Google Chrome:

• Click on the Chrome menu on the browser toolbar.
• Select Tools.
• Select Clear browsing data.
• A dialogue window will appear, providing you with a list of checkboxes for the types of information that you wish to have removed.

How to clear your cache in Internet Explorer (IE):

• Open Internet Explorer.
• From the Tools menu choose Internet Options.
• On the General tab, under Browsing history, click Delete.
• Un-check the Preserve Favourites website data box.
• Check the Temporary Internet files, Cookies, and History boxes.

How to clear your cache in Safari:

• Click Safari in the upper left hand side of your screen. In the menu that appears, click Preferences.
• In the window that appears, click the Privacy tab. Click the button Remove All Website Data
• Click Remove Now in the pop up window that appears.

How to clear your cache in Mozilla Firefox:

• From the History menu, select Clear Recent History.
• From the Time range to clear: drop-down menu, select the desired range; to clear your entire cache, select Everything
• Next to 'Details', click the down arrow to choose which elements of the history to clear; to clear your entire cache, select all items.

​