Windows XP Auto Login
You can configure Windows XP to automate the logon process if your computer is not part of a domain. Computers configured in a business environment generally have a domain and for those machines the option 'Users must enter a username' does not appear because a password must be given to access the local area network or domain.
1. Click Start, click Run, and type control userpasswords2. This is a shortcut instead of having to click on Start -> Control Panel -> User Accounts.
2. Uncheck the 'Users must enter a username and password to use this computer' check box.
3. Click Apply.
4. Enter the user name and password you wish to automatically log on with, and then click OK.
5. Click OK again and you're all done.