This policy setting determines whether Internet Explorer 11 uses 64-bit processes (for greater security) or 32-bit processes (for greater compatibility) when running in Enhanced Protected Mode on 64-bit versions of Windows.Important: Some ActiveX controls and toolbars may not be available when 64-bit processes are used.If you enable this policy setting Internet Explorer 11 will use 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows.If you disable this policy setting Internet Explorer 11 will use 32-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows.If you don't configure this policy setting users can turn this feature on or off using Internet Explorer settings. This feature is turned off by default.