Click Start, Run and type CONTROL USERPASSWORDS2, and click Ok. Select the user account from the list (the account to which you want to automatically logon). Uncheck Users must enter a user name and password to use this computer option, and click Ok. Type the user account password and complete the process.
For Windows XP Home, don't try to auto-login as the built-in Administrator, as you'll receive an error message.
there ya go! works for vista and windows 7 too!
Desktop - DualBoot: Fedora 15/Windows 7 64bit
Netbook - Windows 7 Professional
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