Step 1: Buy and install Wallpaper Engine. Wallpaper Engine costs USD$3.99 and you can get it here: http://store.steampowered.com/app/431960/Wallpaper_Engine/
Step 2: Download an animated wallpaper from this site to your desktop.
Step 3: Go to the bottom right corner and click on the tiny Wallpaper Engine icon.
Step 4: Click on “Change Wallpaper”.
Step 5: Wallpaper Engine window will pop up. Click the “Open from File” button on the bottom left.
Step 6: Locate the animated wallpaper file on your desktop and click “Open” button.
Step 7: After that, click the “OK” button on the Wallpaper Engine window. Ta-dah! You have an amazing animated wallpaper on your desktop! 😀
Disclaimer: We are not affiliated with Wallpaper Engine in any way. We are only fans of their neat software. 🙂