When you manually log on to your Microsoft Windows XP-based computer with a user name and a password, the Winlogon.exe process may prematurely end the Mpnotify.exe process. The Mpnotify.exe process hosts network provider .dll files. Specifically, the Mpnotify.exe process calls the NPLogonNotify function of the network provider .dll file. Therefore, the network provider may not function as expected.

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This problem may occur if the following conditions are true:

•	You have a smart card reader attached to the workstation.
•	The Winlogon.exe process detects the smart card reader in the background during the logon process.

The Winlogon.exe process incorrectly ends the Mpnotify.exe process when any secure attention sequence (SAS) events are detected in the background.

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Hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

There are no prerequisites.

Restart requirement

You must restart your 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.

Windows XP, 32-bit editions

Windows XP Service Pack 1

    Date         Time   Version       Size     File name
   --------------------------------------------------------
   29-Sep-2004  16:00  5.1.2600.1596  398,848  Licdll.dll       
   29-Sep-2004  05:58  5.1.2600.1596  483,328  Winlogon.exe     
 

Windows XP Service Pack 2

   Date         Time   Version        Size     File name
   --------------------------------------------------------
   29-Sep-2004  16:05  5.1.2600.2524  423,936  Licdll.dll       
   29-Sep-2004  15:56  5.1.2600.2524  502,784  Winlogon.exe  

Windows XP, 64-bit editions

   Date         Time   Version        Size     File name
   --------------------------------------------------------
   29-Sep-2004  02:14  5.1.2600.1596  649,216  Winlogon.exe     

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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A SAS is a key sequence that begins the process of logging on or off of a computer. By default, this sequence is CTRL+ALT+DEL.

After you install this hotfix, the Winlogon.exe process will not incorrectly end the Mpnotify.exe process when smart card SAS events are detected.

For additional information about Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:

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