Clearing Google Internet Search History
Select "Internet Options" from the Internet Explorer "Tools" menu.
Select the "Content" tab at the top of the "Internet Options" window.
In the "Personal information" section at the bottom, click the "AutoComplete" button.
On the AutoComplete Settings window, click on the "Clear Forms" button.
You will get a window asking you to confirm clearing the history.
Click "OK", and you're done.