Auto Logon in Windows XP
In Windows XP Home and Professional you can make your computer automatically logon as a specified user when the computer starts. This eliminates the need for the user to select a user name and enter a password to logon. You get this auto logon feature if there is only one account on the computer (other than the Admin account) and it has no password.
You might ask yourself why you would want to do this (besides security issues). Well, I setup a computer for a friend of mine and I loaded SpyBot Search & Destroy. I wanted SpyBot to update itself every night. SB sets up a Windows Scheduler job to make this happen. You cannot run a Windows Scheduler job under an account that does not have a password. So I had to add a password to the user's Windows Account. This means they have to logon now. Instead of making my friend have to logon I just followed the instructions below and they were immediately back to auto logon functionality.
These are the steps to make the auto logon feature work on XP Home and Professional:
- Click Start, and then click Run.
- In the Open box, type control userpasswords2, and then click OK.
- Clear the "Users must enter a user name and password to use this computer" check box, and then click Apply.
- When you click Apply or OK you will get an Automatically Log On window popup. Type the password in the Password box, and then retype the password in the Confirm Password box.
- Click OK to close the Automatically Log On window, and then click OK to close the User Accounts window.
This information is outlined in a Microsoft KB article - http://support.microsoft.com/kb/315231

