Auto Suggest.

[Guest]

How do I clear out all the aotu suggestions it comes up with every time I
start typing in a textbox?

 

[Guest]

Try selecting "Tools" from the Internet Explorer drop down menu, then select
Internet Options, then the "Content' Tab", then the "Autocomplete" tab, and
then click on "clear forms." If you use aol, you may also need to go to the
"settings" tab at the top of your screen, select Internet options, and then
repeat the steps above.

 

[Guest]

Try selecting "Tools" from the Internet Explorer drop down menu, then select
Internet Options, then the "Content' Tab", then the "Autocomplete" tab, and
then click on "clear forms." If you use aol, you may also need to go to the
"settings" tab at the top of your screen, select Internet options, and then
repeat the steps above.

 

[Ramesh, MS-MVP]

To modify your settings for the AutoComplete feature or clear all items from
the list of form or password suggestions, follow these steps in Internet
Explorer:

1.On the Tools menu, click Internet Options.
2.Click the Content tab.
3.Click AutoComplete.
4.Click the appropriate AutoComplete check boxes, or click Clear Forms or
Clear Passwords to clear all saved items from the appropriate AutoComplete
history.
5.Click OK, and then click OK.

To clear individual items from the list of form or password suggestions,
click the item in the list of suggestions for that field and then press
DELETE. The AutoComplete list automatically appears when you perform any of
the following actions on a previously populated form:

* Type the first character in the field
* Press the UP or DOWN keys in the field
* Double-click a blank area in the field

Source:
How to use the AutoComplete feature in Internet Explorer 5 and 6:
http://support.microsoft.com/?kbid=217148