How start computer automatically with username and password

For automatic login in Windows XP, user and password, must follow these instructions:
Start > Run > type control userpasswords2 and push Enter

2. In the User Accounts window, uncheck the box on the left Users must enter a username and password to use this computer and press the button Apply 
3.Enter username and password for the user you want to automatically start the computer and press  OK...and OK again.

Restart the computer and the next time Windows should do your logon automatically with your chosen user in step 3.