If you select many images, the wallpaper will alternate between the photos at the interval you select at the bottom of the screen. You can then select one or many pictures to use as a wallpaper. The resulting window will let you browse to a directory with pictures. On the window that pops up, click Desktop Background at the bottom. To change the wallpaper: In the Desktop, right-click any plain spot on the background and go down to Personalize. The lock screen can accept various image formats including animated gifs, though they will be a still image, not animated. You will probably want to choose a high-resolution image for best results. Below those sample images, you can also hit the ‘Browse’ button to find an image of your own. You can choose Lock Screen at the top and then choose between the images Windows offers by default.

This will take you to the PC Settings screen with Personalize chosen first. Then on the next menu that shows up, go down to the very bottom and click Change PC Settings. Go up to the top-right corner of your screen and zipper down the Charms menu to the Settings gear (or press Windows Key + I). The default lock screen is pictured below but you can change it to a different image if you would like. The lock screen is what appears before the sign in screen if you lock your computer or leave the computer alone for long enough. Here’s a guide to changing your color scheme, your lock screen, the Start Screen background style, and your desktop’s wallpaper. Windows 8 has a few more options for customization over Windows 7 but finding where to make those changes can be a little confusing.

How to make a gif background windows 8