How to maximize the privacy settings in Windows 10:
- Open the Start menu.
- Type something, and then click the gear icon on the left. (Alternatively, search for Cortana & Search settings and click the relevant result.)
- Set everything to Off, and under Device search history click Clear all.
- At the bottom of these settings, click Other privacy settings. (Alternatively, open the Settings application and click on Privacy.)
- Go through everything from General to Other devices, setting each toggle to Off.
- In Feedback & diagnostics, choose Never and Basic.
Video:
https://www.youtube.com/watch?v=BiYcrhb5mA8