Microsoft KB Archive/906681

= A user can log on to a Windows XP-based computer by using a user name and a password, even though the &quot;Smart card is required for interactive logon&quot; user account property is set =

Article ID: 906681

Article Last Modified on 8/29/2007

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APPLIES TO


 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
Consider the following scenario:
 * The Smart card is required for interactive logon user account property is set on a computer that is running Microsoft Windows XP.
 * The smart card is lost or damaged. The user is temporarily permitted to log on by entering a user name and a password.
 * Later, a new smart card is issued to the user. The user is again required to log on only by using a smart card.

In this scenario, the user can still log on offline with the temporary user name and password.



CAUSE
This problem occurs because the user name and the password are cached on the computer.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To apply this hotfix, you must have Windows XP Service Pack 2 installed.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version        Size     File name 30-Aug-2005 04:07  5.1.2600.2749  298,496  Kerberos.dll 25-Feb-2005 03:35  6.1.22.4       371,936  Updspapi.dll After this hotfix is installed, the credentials are deleted when the user uses the smart card to log on online. Afterward, the user can logon offline only by using the smart card.



WORKAROUND
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.To work around this problem, follow these steps.

Note After you follow these steps, only the credentials for the most recently used account are cached. Only the most recently used account can log on offline. This workaround may not be the best solution if the computer is used by more than one user.  Click Start, click Run, type regedit, and then click OK. Locate and then click the following registry subkey:

 In the right pane, right-click, and then click Modify. Type 1 in the Value data box, and then click OK. Quit Registry Editor.</li> Restart the computer.</li></ol>

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

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MORE INFORMATION
For more information about the terminology that is used in this article, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbqfe kbhotfixserver kbwinxpsp3fix kbwinxppresp3fix kbfix kbbug kbpubtypekc KB906681

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