To delete Autocomplete entries from the Address bar list
The AutoComplete feature saves previous entries you've made for Web addresses, forms, and passwords. To delete entries from the Address bar, you must clear your History folder. You cannot clear individual entries from the list of saved entries.
On the Tools menu in Internet Explorer, click Internet Options.
Click the General tab.
Under History, click Clear History.
When typing information in Web forms, and typing passwords, you can remove an item from the list of suggestions by clicking the item and then pressing the DELETE key.
For Help on an item, click at the top of the dialog box, and then click the item.