Microsoft KB Archive/300433

= The &quot;Administrator Logon&quot; Dialog Box May Be Hidden Under the Welcome Screen or &quot;The System Could Not Log You on&quot; Message May Be Displayed =

Article ID: 300433

Article Last Modified on 1/15/2006

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APPLIES TO


 * Microsoft Windows XP Professional

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This article was previously published under Q300433



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
The Administrator Logon dialog box may be hidden under the Welcome screen when the AutoAdminLogon feature is enabled and the user account is either deleted or missing.

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The Log On to Windows dialog box may be displayed with incorrect credentials after the Autologon feature had been unsuccessful, and you received the following error message:

The system could not log you on. Make sure your user name and domain are correct, then type your password again. Letters in passwords must be typed using the correct case.



CAUSE
This problem can occur because the Autologon feature is attempting an automatic logon for a user account that does not exist. Either the account has been deleted or removed, but the registry settings for that account are still intact.



RESOLUTION
To work around the problem that concerns the hidden Administrator Logon dialog box, press ALT+TAB to bring the dialog box to the front of the screen so that you can log on to the computer with valid credentials.

To work around the other problem, remove or update the appropriate registry key if the Autologon feature is required for an existing account. If you do not need or you do not want the Autologon feature, change the setting of the Autologon feature so that AutoAdminLogon=0.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

The symptoms that are described in this article may occur if the following conditions are true:
 * The AutoAdminLogon feature is enabled for an administrator account.
 * The account for which the AutoAdminLogon feature is set, is either deleted or does not exist, but the registry settings for the Autologon feature for that account are still in the registry. The symptoms occur whenever you delete an account for which the Autologon feature is set.

The registry and its settings are:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

DefaultDomainName (REG_SZ) :

DefaultUserName (REG_SZ):

DefaultPassword (REG_SZ):

AutoAdminLogon (REG_SZ): 1

AutoLogonCount (REG_DWORD) : any value greater than one (1)

Keywords: kbenv kbprb KB300433

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