Windows 8 picture password

Windows 8 Tips.
Use a picture password to log into your computer. Windows 8 includes a new feature called Picture password, which allows you to authenticate with the
computer using a series of gestures that include circles, straight lines, and taps. Enable this feature if you want a new way to access your computer or have a hard time with passwords. 

Open the Windows Charms. Click Settings and then More PC settings In the PC settings  window click Users and then select Create a picture password.