Start – Run – regedit – [enter]
Locate the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon
Double-click DefaultUserName, type in your user name, click OK
Double-click DefaultPassword, type in your password, click OK
If there is no DefaultPassword value, create the value with the associated password.
Note that if no DefaultPassword string is specified, Windows XP automatically changes the value of the AutoAdminLogon registry key from 1 (true) to 0 (false) to turn off the AutoAdminLogon feature.
If there is no AutoAdminLogon entry, create the entry and set its value to 1
To bypass the automatic logon and log on as a different user, hold down the SHIFT key while logging off or during Windows Starting. To enforce this setting for future logoffs, set the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon
Value:ForceAutoLogon
Type: REG_SZ
Data: 1