Microsoft KB Archive/834631

= An interrupt storm that is generated by the ACPI driver causes a Windows Server 2003-based or a Windows XP-based computer to stop responding =

Article ID: 834631

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * 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
A Microsoft Windows Server 2003-based computer or a Microsoft Windows XP-based computer may stop responding (hang).



CAUSE
This problem may occur if an interrupt storm is generated by the Acpi.sys driver.

Note An interrupt storm is defined as a level-triggered interrupt signal that remains in an asserted state.



Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

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
No prerequisites are required.

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 ---  07-Sep-2003  16:37  5.2.3790.83  179,200  Acpi.sys



Service pack information
To resolve this problem, obtain the latest service pack for Windows XP. For more 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

Note The fix for Windows XP was not released as an individual hotfix.



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

This problem was first corrected in Microsoft Windows Server 2003 Service Pack 1.

This problem was first corrected in Microsoft Windows XP Service Pack 2.



MORE INFORMATION
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.

After you apply the service pack or the hotfix, you must modify the  registry subkey.

To do this, follow these steps.  Click Start, click Run, type regedit in the Open box, and then click OK. Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ACPI\Parameters

Note If the Parameters subkey does not exist, right-click ACPI, point to New, and then click Key. Type Parameters as the subkey name, and then press ENTER. Right-click the Attributes entry, and then click Modify.

Note If the Attributes entry does not exist, right-click Parameters, point to New, and then click DWORD value. Type Attributes as the entry name, and then press ENTER. In the Edit DWORD Value dialog box, click Hexadecimal, type 100 in the Value data box, and then click OK.</li> Quit Registry Editor.</li></ol>

For more information, 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: kbwinxpsp2fix kbbug kbfix kbqfe kbwinserv2003presp1fix KB834631

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