In Windows 10, the lock screen image is shown in a number of cases. For instance, if you locked your user session using Win+L or by clicking the user image in the Start Menu, the lock screen image will appear and show a background image. If you are signing in to Windows 10, you need to dismiss the Lock screen to proceed with the sign-in screen. Here is how you can change the Lock screen background image to a custom image in Windows 10.
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