USER ACCOUNTS control panel has an option to "Change the way users log on or off."
Not sure what you want. Do you want to boot directly to Windows XP without having to enter a password?
I tried the Restore XP Login Screen online tool. It checked my registry and pronounced things to be okay. The problem is that the screen itself is wrong. The malware (?) theme that was installed has replaced the default blue Welcome screen with its own. I found and deleted part of the problem, but the unwelcome ''welcome/login'' screen remains.
If someone could just tell me where that Welcome/Login screen is kept and what its name is, I should be able to replace it with the correct default file.