Windows 8 Consumer Preview asks for password and login details to login by default and it takes a few moments to login. Besides this, it is very annoying to enter password every time you have to login. You can disable this login prompt by unchecking a single button.
This tutorial would show hot to disable password prompt on login using Windows 8 Consumer Preview. Just follow the simple instruction below and you wont be asked for password next time you login.
Instructions:
First of all, press Windows + R.
Run command would open.
Type in
netplwiz
User Accounts pop-up window would open.
Uncheck the Users must enter a username and password to use this computer and press ok at the bottom of the pop-up window.

Type in your username and password in the next pop-up window.

Press ok and we are done.
You wont be asked for password to login to Windows 8 Consumer Preview in future.
source:windows8core