Unlike the per-user lock screen image, the default one cannot be changed using the Settings app.
Here is how the lock screen image for my user account looks like:Īnd this is the default lock screen image set in my Windows 10:Īs you can see from the screenshots above, they are two different images. If you enable the Ctrl + Alt + Del sign in requirement, it will appear instantly. When you sign out from your Windows 10 user session, after one minute the default Lock screen image appears.
