WinWall

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.
Once you’re done with the wallpaper selection process, you’re ready to jump into the “Options” screen where you can choose the way wallpapers are changed, with two options at your disposal: randomly or sequentially. What’s more, you can define the change interval, but also the Tray icon behavior that can also change wallpaper on a single or double click.
Hotkey support is also available to switch to another wallpaper, and so is a background color adjustment utility, very handy in case your wallpaper doesn’t fit the screen.
WinWall can automatically stretch the wallpaper to fit the desktop or tile the image, while also providing multiple alignment modes to make sure everything looks as good as possible.
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.
All things considered, WinWall is one of the attractive pieces of software when it comes to auto wallpaper changing. It can be used by both beginners and those more experienced and it gets along very well with every Windows version out there.