WinWall is a freeware Windows software solution that can automatically  change desktop wallpapers at a user-defined interval.The simple program  GUI makes everything a breeze regardless of users’ computer knowledge,  with all features and options grouped in a tabbed layout.WinWall  supports BMP, GIF, JPG and PNG image files and provides a small preview  panel to let you see the selected wallpaper without the need for opening  the photo separately. Several details are also available, including  resolution, filename and format.WinWall doesn’t affect the overall  system performance at all and although it places an icon in the Windows  System Tray, everything works like a breeze with a very reduced  footprint on hardware resources.