Windows 8 has a new feature that allows creation of PIN for an user. PIN is a 4 digit number which can be used instead of password to logon to the system. This is quite useful if you are finding difficult to remember or type the password.
Step 1: Click the Settings icon in Windows 8 sidebar then the Change PC Settings
Step 2: In the PC Settings screen, navigate to Users section under PC Settings and click Create a PIN under Sign-in options.
Step 3: For security reason, you will be ask to enter the logged on user password. After authenticating the user the following Create a PIN screen will be displayed.
Enter the the 4 digit code and click the Finish button.
If you want to Remove or Change the PIN then you can use the option available under Sign-in options.