Make-the-Windows-10-Start-Menu-and-Cortana-Search-Google-Instead-of-Bing:-
By default, when you search the web in Windows 10 using the new Search box on the Taskbar or using Cortana, you get results from Bing. However, if you prefer getting your search results from Google, there’s a way to change this behavior.
https://youtu.be/3Ej4b1gqnBc