(From the Microsoft Site) To use Registry Editor (Regedt32.exe) to turn on automatic logon, follow these steps:
Click Start, and then click Run.
In the Open box, type Regedt32.exe, and then press ENTER.
Locate the following subkey in the registry:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon
Double-click the DefaultUserName entry, type your user name, and then click OK.
Double-click the DefaultPassword entry, type your password, and then click OK.NOTE: If the DefaultPassword value does not exist, it must be added. To add the value, follow these steps:
On the Edit menu, click New, and then point to String Value.
Type DefaultPassword, and then press ENTER.
Double-click DefaultPassword.
In the Edit String dialog, type your password and then click OK.
NOTE: If no DefaultPassword string is specified, Windows automatically changes the value of the AutoAdminLogon key from 1 (true) to 0 (false), disabling the AutoAdminLogon feature.
On the Edit menu, click New, and then point to String Value.
Type AutoAdminLogon, and then press ENTER.
Double-click AutoAdminLogon.
In the Edit String dialog box, type 1 and then click OK.
Quit Registry Editor.
Click Start, click Shutdown, and then type a reason in the Comment text box.
Click OK to turn off your computer.
Restart your computer. You can now log on automatically.
Notes To bypass the AutoAdminLogon process and to log on as a different user, hold down the SHIFT key after you log off or after Windows restarts.
Registry change will not work if the “Logon Banner” is defined on the server either by a Group Policy object (GPO) or by a local policy. When policy is changed to not impact server, the feature works as expected.
An interactive console logon that has a different user on the server changes the DefaultUserName registry entry as the last logged on user indicator. AutoAdminLogon relies on the DefaultUserName entry to match the user and the password. Therefore, AutoAdminLogon may fail. You may configure a shutdown script to set the correct DefaultUserName entry for AutoAdminLogonAs. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
119364
(http://support.microsoft.com/kb/119364/ )
AutoAdminLogon loses DefaultUserName