The background images are stored in the same location where Spotlight Lock Screen ... Spotlight as a desktop background. As explained in detail in this post, simply open Personalization settings ...
Having thus reset Windows Spotlight preferences & settings, open the Lock Screen personalization settings ... lock screen and see if you have a new wallpaper or not. Related: Turn on or off ...
The lock screen on your Windows computer makes a first impression on you every day, so a little personalization can go a long way. Windows allows you to control the lock screen's background image ...