Free desktop backgrounds can be downloaded from Microsoft.com and WallpapersWide.com. Personal photos or other pictures saved on a computer can also be set as the desktop background using the Windows Control Panel.
To set a picture as the desktop background in Windows, open the Start menu and select the Control Panel option. Select the option to Change Desktop Background for a gallery of background images. If the preferred image is not in the gallery, search for it in the Picture Location menu, or Browse all folders on the computer. Select the desired image and double-click it to set it as the desktop background.