Turn off suggestions for all user-installed providers
Supported on: At least Internet Explorer 8.0
Registry
HKLM
Software\Policies\Microsoft\Internet Explorer\SearchScopes HKCU
Software\Policies\Microsoft\Internet Explorer\SearchScopes Value name: ShowSearchSuggestionsGlobal
Enabled: ShowSearchSuggestionsGlobal = 0
Description
This policy setting allows you to turn off suggestions for all user-installed search providers. If you enable this policy setting, the user cannot view suggestions for user-installed search providers. If you disable or do not configure this policy setting, the user can choose to view suggestions for all user-installed search providers that offer suggestions.