Script Download: The script is available for download from http://gallery.technet.microsoft.com/How-to-log-in-the-system-3ddceb9b. You can also use Microsoft Script Browser for Windows PowerShell ISE to download the sample with one button click from within your scripting environment.
This PowerShell script sample shows how to automatically log in the system without entering password at startup in Windows 8.
A Microsoft account user must enter a password or a pin to log in the system when it starts up. Sometimes it seems not very convenient, this script is to log in the system without password when the system starts up.
You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery
thanks for sharing.