This policy setting allows you to specify whether a user can browse to the website of a top result when search is enabled on the Address bar. The possible options are: • Disable top result search: When a user performs a search in the Address bar a list of search results from the selected search provider is displayed in the main window. • Enable top result search: When a user performs a search in the Address bar the user is directed to an external top result website determined by the search provider if available.If you enable this policy setting you can choose where to direct the user after a search on the Address bar: a top-result website or a search-results webpage in the main window.If you disable or do not configure this policy setting the user can select their preference for this behavior. Browsing to the top-result website is the default.
Windows Components\Internet Explorer\Internet Settings\Advanced settings\Searching
User
At least Internet Explorer 9.0
HKCU\Software\Policies\Microsoft\Internet Explorer\SearchScopes!TopResult
inetres.admx