To do so, open Internet Explorer. Next open Internet Options and click on the Content tab.

Under AutoComplete, click on Settings.

Here you can see that you can select what to display in the drop-down lists:

BrowsingHistoryFavoritesFeedsUse Windows Search for better resultsSuggesting URLs.

Check the one’s you want to be displayed and uncheck what you don’t need. Click on Apply/OK. Restart IE. You will see that the address bar auto-complete drop-down list looks much more manageable now.

If you wish, you can also delete the AutoComplete history here or Manage Passwords. How to Enable or Disable AutoComplete and Inline AutoComplete may also interest you.