Unlock Your Computer Using your Favourite Picture on Windows 10
Windows 10 now offers the option of using a 'Picture Pin' which means that you can select an image from your library to use as a password.
You choose the image then perform three gestures on the picture which will then be your 'pin'. It's a great feature if you're using a touch screen device!
Don't worry though, even if you set up the 'Picture Pin' you can still access your device using a traditional password.