How to make Windows login automatically to a user if there are more than one users? [duplicate]

The system is Windows7 64-bit Integral Edition. There are two administrator users : Ambre-68 and postgres. When I start my computer then there is the screen showing the choice of users. I want Windows to login automatically to the user AMbre-68. How to do that ?

Go to Start | run (or hit Win+R) and enter control userpasswords2. There should be an option called "users must enter a username and password to use this computer". I don't think it's available on domain PCs though. Un-check this option and you will be prompted to enter the details of the user you want to automatically log in.

This question addresses what to do if you're on a domain.