Instead of a monotonous, staid wallpaper lock screen, you could be greeted by a ... and your Photo Shuffle will be live. As cool as Photo Shuffle is, there are several ways things could go awry ...

Customize your Lock Screen by creating multiple wallpapers & experimenting with designs easily. Change wallpaper appearance ...

Your lock screen wallpaper keeps changing because the Background setting is configured to Windows Spotlight or Slideshow. These settings automatically rotate images on your lock screen.