This AutoComplete feature suggests possible matches when users are filling up forms.If you enable this setting the user is not suggested matches when filling forms. The user cannot change it.If you disable this setting the user is suggested possible matches when filling forms. The user cannot change it.If you do not configure this setting the user has the freedom to turn on the auto-complete feature for forms.To display this option the users open the Internet Options dialog box click the Contents Tab and click the Settings button.
Windows Components\Internet Explorer
At least Internet Explorer 5.0
HKCU\Software\Policies\Microsoft\Internet Explorer\Main!Use FormSuggest; HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel!FormSuggest