It’s pretty easy to change the image on the lock screen in Windows 10. I’ll show you how to do it. You can right-click on a blank space on the desktop and choose Personalize from the drop-down menu.
Alternatively, open your Start Menu, choose settings, and then select Personalization. You can also type “change the desktop” in your search box and click on the results. When the window opens, select Lock screen on the left side of the page.
You’ll have the choice between photos offered by Windows or adding photos or slideshows from your own collection.
If you select Picture, you can browse your own files to select your favorite image.
Choose Slideshow and you can choose from the Pictures folder or add the folders of your choice. If you wanted a slideshow of 10 specific images, you could create a file, copy the images into there, and select it for the slideshow.
If you click on Advanced slideshow settings, you can decide when and for how long your slideshow will run.