Thank-you for your question.
You can clear the search history of previous searches by following the
"In Internet Explorer 5 or higher, select "Tools" from the menu, then
'Internet Options' and then choose the 'Content' tab. Next, look for
the button at the bottom that says 'AutoComplete'. Click on the button
which will make the AutoComplete Settings window appear. In it, click
on the 'Clear Forms' button to delete all your stored form entries."
"If you are a Google Toolbar user, the techniques above won't work to
remove your past searches from the toolbar. Instead, you'll need to
click on the Google logo next to the Google Toolbar's search box, then
choose "Clear Search History" from the drop-down box that appears."
Removing a particular query in the list of past searches:
Click once in the search box and get a drop down box to appear (it may
take a second or so to show up, listing all the things you've searched
for in the past. Alternatively, you can start typing a query, and
you'll be shown any queries that contain the first letters that you've
Then, "use the arrow keys on your computer keyboard to highlight the
particular entry. Alternatively, highlight the entry using your mouse
but don't click on it. Next, once the entry has been highlighted, push
the 'Delete' button on your computer keyword. The entry should
Search Engine Watch: Clearing Your Search History From Google And
Other Search Engines
If you require any further assistance on this subject please do not
hesitate to ask for clarification.