Set My Wallpaper. INSTANTLY Improve Your Setup Wallpaper. To add additional images to this list click Browse and select a wallpaper you want to use.
At the bottom right select the time. Click on it and you will see the Set Wallpaper option. Change background wallpaper.
And theres what you seek.
As soon as you do so the GIF file will be set as your desktop background. I use only windows neutral colors for wallpaper. As soon as you do so the GIF file will be set as your desktop background. Click the box beneath the Background.