This policy setting allows you to enforce full-screen mode which disables the navigation bar the menu bar and the Command bar. Starting with Windows 8 this policy only applies to Internet Explorer on the desktop.The navigation bar includes features for browsing webpages searching the web by using a selection of search tools viewing a history of visited pages printing and accessing email and newsgroups. The menu bar contains menus that open lists of commands for printing customizing Internet Explorer copying and pasting text managing favorites and accessing Help. The Command bar enables the user to access and manage favorites feeds shortcuts to home page and more. Full-screen mode disables not only these three bars but also the shortcuts to these bars.If you enable this policy setting the navigation bar the menu bar and the Command bar are not visible and the user cannot access them.If you disable or do not configure this policy setting the user can view and access the navigation bar the menu bar and the Command bar.
Windows Components\Internet Explorer
At least Internet Explorer 7.0
HKCU\Software\Policies\Microsoft\Internet Explorer\Main!AlwaysShowMenus; HKCU\Software\Policies\Microsoft\Internet Explorer\Toolbars\Restrictions!NoNavBar HKCU\Software\Policies\Microsoft\Internet Explorer\Toolbars\Restrictions!NoCommandBar