How to eliminate the login box on the screen windows 7

In this post we do not discuss about how to crack windows login passwords. But we try to disable or remove (disable) the login password / login screen windows 7, I mean the login box/logon screen like below :

With the switch off (disable) to log in a password (log on password), then it could speed up the loading time (start up) your windows seven, his weakness is that if your box is opened by your friends without asking permission, so he could open your computer.
So you need to consider if the existing data in your computer that should not be shared with others. how to remove the log in (log on) password is not effective.
 
To remove/disable password to log in (log on) windows 7 you can do the following procedure:
1. At the start menu select control panel
In the following dialog box, select Add or remove user accounts
2. Select the user (super user / administrator), click the remove the password
3. enter your current password, click remove password
Restart the computer, if successful then no longer log in a password box to enter your windows 7