To enable automatic logonĀ  in Windows XP using the registry, see tips 3448 and 0004.

To enable automatic logon for a Windows XP Professional domain member without editing the registry:

Use TweakUI from the Windows XP PowerToys.

To enable automatic logon for Windows XP Home Edition or Windows XP Professional (non-domain member) without editing the registry:

1. Start / Run / control userpasswords2 / OK.

2. On the Users tab, clear the Users must enter a user name and password to use this computer box.

3. Press Apply and OK.