Here’s an application that can set a custom background images for your windows lock screen. A free application named “Chameleon” that will help you to personalize the new images or rotating images that change periodically as your lock screen background. The application has a built-in support for images from NASA’s astronomy picture of day, Bing picture of the day, National Geographic photo of the day and images from popular wallpaper websites.
This application can be configured to change the background image automatically at specific interval. The user’s can also create his own pool of images from which the app can choose from.
You can download the application from the Windows App store.
