A Program That Is Running at Real Time Can Lock Windows XP If Themes Are Enabled

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Article ID: 317159 - View products that this article applies to.
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Symptoms

If you have a program that runs at real-time priority, if you click one of the caption bar buttons (for example, Minimize, Maximize, or Close), Windows XP stops responding (hangs).

Cause

This problem occurs when the process runs at REALTIME_PRIORITY_CLASS and the thread that owns the program window runs at THREAD_PRIORITY_TIME_CRITICAL. As a result, the caption button hit-testing routine enters a tight loop and Windows XP stops responding.

Resolution

To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 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
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.

File information

The English version of this fix 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
   ---------------------------------------------------------------------
   21-Feb-2002  11:28  6.0.2600.29  190,464  Uxtheme.dll
				

Workaround

To work around this problem if your program must run at real time, use one of the following methods:
  • Disable themes across the computer by turning off the Themes service.
  • Disable themes in the affected programs by calling SetThemeAppProperties.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows XP Service Pack 1.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Properties

Article ID: 317159 - Last Review: December 24, 2014 - Revision: 1.0
Applies to
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
Keywords: 
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kbbug kbfix kbshell kbwinxpsp1fix KB317159

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