Microsoft small business knowledge base

Article ID: 893376 - Last Review: January 16, 2015 - Revision: 4.0

Hotfix Download Available
View and request hotfix downloads
This article has been archived. It is offered "as is" and will no longer be updated.

On This Page


Consider the following scenario:
  • You use a smart card for user authentication on a computer that is running either Microsoft Windows XP Service Pack 1 (SP1) or Windows XP Service Pack 2 (SP2).
  • You insert the smart card in to the reader and type the PIN to initiate the log on process.
  • You remove the smart card before the log on process is completed.
  • You insert the smart card again.
In this scenario, a stack corruption occurs, and the computer stops responding (hangs). Additionally, you receive the following error message:
STOP: 0xc000021a {Fatal System Error}


This problem occurs because of a race condition in the Winlogon process.


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.


This hotfix requires Windows XP SP1 or Windows XP SP2.

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.
Windows XP SP1, x86-based versions
Date         Time   Version            Size    File name
28-May-2005  02:28  5.1.2600.1695     971,776  Msgina.dll       
27-May-2005  23:55  5.1.2600.1695     594,432  Xpsp2res.dll     
27-May-2005  23:56  5.1.2600.1695       7,168  Xpsp3res.dll     
Windows XP SP2, x86-based versions
Date         Time   Version            Size    File name
28-May-2005  02:37  5.1.2600.2687     996,864  Msgina.dll       
27-May-2005  23:36  5.1.2600.2687      17,920  Xpsp3res.dll            
Windows XP SP1, Itanium-based versions
Date         Time   Version            Size    File name       Platform
27-May-2005  13:55  5.1.2600.1695   1,274,880  Msgina.dll       IA-64
27-May-2005  11:51  5.1.2600.1695     593,920  Xpsp2res.dll     IA-64
27-May-2005  11:52  5.1.2600.1695       6,656  Xpsp3res.dll     IA-64
27-May-2005  13:59  5.1.2600.1695     971,776  Wmsgina.dll      x86
27-May-2005  11:25  5.1.2600.1695     594,432  Wxpsp2res.dll    x86
27-May-2005  11:26  5.1.2600.1695       7,168  Wxpsp3res.dll    x86


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

More information

For more information about the standard terminology that is used to describe Microsoft software updates, 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
kbnosurvey kbarchive kbautohotfix kbqfe kbhotfixserver kbwinxppresp3fix kbfix kbbug KB893376
Additional support options
Ask The Microsoft Small Business Support Community
Contact Microsoft Small Business Support
Find Microsoft Small Business Support Certified Partner
Find a Microsoft Store For In-Person Small Business Support