Using a picture password is a fun way to keep your device secure while not having to remember a complex password. To enable it, press th Windows key and the I key to get to the settings charm. Click on 'Change PC settings' at the bottom right, then go to the 'Users' tab. Under the 'Sign-in options' you'll see the "Create a picture password" button. This will give you the option to choose any picture and then define three gestures anywhere on the image. Your gestures can be circles, swipes and clicks. Just remember, The direction of each gesture matters. After confirming it a couple times, your picture password will be set.