This is a wallpaper for Crusaders Quest, a free mobile game they can download from the Google play store in the Android Market in the role-playing category.
If you’d like to use is Crusaders Quest wallpaper for your Windows computer, you simply have to open up the full resolution by clicking on the image below.
Once you have the image open in high definition, just right-click it and set it as your desktop background.
If the option to set the wallpaper as your desktop background doesn’t exist, then choose to save the image to your computer. Then find the Crusaders Quest wallpaper on your computer where you saved it, and then right-click that file and said as your desktop background.