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Article ID: 823736 - Last Review: May 17, 2007 - Revision: 2.6

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SYMPTOMS

When you try to unlock your computer by pressing CTRL+ALT+DELETE, your computer restarts unexpectedly. You may receive the following Stop error:
STOP: c000021a (Fatal System Error)
The Windows Logon Process System process terminated unexpectedly with a status of 0xc0000005 (0x0000000 0x00000000). The system has been shut down.

CAUSE

This issue may occur when the following conditions are both true:
  • The Multilingual User Interface Pack (MUI) is installed on your computer.

    -and-
  • The Language bar is in the upper-left area of your screen when you lock your computer by pressing CTRL+ALT+DELETE.

WORKAROUND

To work around this issue, move the Language bar to the bottom of your screen before you lock your computer.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389  (http://support.microsoft.com/kb/322389/EN-US/ ) How to obtain the latest Windows XP service pack

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

The English version of this hotfix has the file attributes (or later) 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
   -----------------------------------------------------
   18-Aug-2003  17:09  8.1.4009.0  811,065  Imjp81k.dll
   14-Jul-2003  16:41  5.3.18.6      6,656  Spmsg.dll
   01-Aug-2003  20:14  5.3.18.6    100,352  Spuninst.exe

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.

REFERENCES

For additional information about the Language bar, click the following article number to view the article in the Microsoft Knowledge Base:
306993  (http://support.microsoft.com/kb/306993/ ) HOW TO: Use the Language Bar in Windows XP

APPLIES TO
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
Keywords: 
kbautohotfix kbhotfixserver kbqfe kbwinxpsp2fix kbqfe kbwinxppresp2fix kbfix kbbug KB823736
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