Microsoft quietly began ignoring a setting commonly used to disable Bing search results in the Windows 10 Start Menu. The ‘BingSearchEnabled’ Registry value is now being ignored. Windows 10 users can disable the setting by setting the following Registry values: [HKEY_CURRENT_URRENT_USER_USERSoftwareMicrosoftWindowsCurrentVersionSearch] [D]CortanaConsent”=dword:00000000. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..””BINGSearchEnabled””=Dword:00000001″” Microsoft has contacted Microsoft to question why BingSearchEnabled was disabled.”
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-ignores-method-to-disable-bing-in-start-menu-fix-found/