After starting your computer, all Windows 10 users will be greeted by the lock screen, and only after another click or tap of a button will you be taken to the login screen. You can change how this works – how depends on whether you’re running Windows 10 Home or Windows 10 Pro.
Lock Screen
How can I set an Animated screensaver instead of a static lock screen?
With Windows 8, Microsoft introduced the lock screen, retiring the screen saver that has been popular for decades.