How to Change the Lock Screen Image in Windows 8

 The Lock screen is mostly controlled via a single settings screen. To get there, press Windows key+C to display the Charms bar, and select Settings→Change PC Settings→Personalize→Lock Screen. A screen appears, shown in Figure , that displays your Lock screen image at the top. Just beneath it are other Lock screen images you can use. Click any one of them to make it the new Lock screen image. To find other images you can use for the Lock screen, click the Browse button and browse through your pictures. Select the one you want to use, click Choose Picture, and you’ll make it your new Lock screen image.