On Windows 11, the Lock screen shows a different wallpaper image every time you start the computer using the Spotlight feature, but you can configure this feature to show a custom image or a collection of pictures, and in this guide, you will learn how to complete this task through the Settings app.
To change the Lock screen wallpaper on Windows 11, open Settings > Personalization > Lock screen, select the “Picture” option, click “Browse photos,” choose the new Lock screen wallpaper, and click “Choose picture.”.