Microsoft KB Archive/939780

= Error message when a Windows XP SP2-based multiprocessor computer uses driver Battc.sys: &quot;STOP 0x000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL&quot; =

Article ID: 939780

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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SYMPTOMS
When you work with a Windows XP Service Pack 2-based multiprocessor computer, you may receive an error message that resembles the following:

STOP 0x000000D1

DRIVER_IRQL_NOT_LESS_OR_EQUAL

Note The values of the parameters vary in different situations.

This problem occurs if one of the following conditions is true:
 * The computer is a portable computer.
 * The computer has a USV. A USV is also known as an uninterruptable power supply (UPS).



CAUSE
This error message occurs because of a problem in the battery driver (Battc.sys).



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 Windows XP 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
To apply this hotfix, you must have Windows XP Service Pack 2 (SP2) installed.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

Registry information
To use this hotfix, you do not have to make any changes to the registry.

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 item in Control Panel.

Windows XP SP2, 32-bit versions


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



MORE INFORMATION
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

Additional query words: Battc.sys USV, STOP 0xD1

Keywords: kbexpertisebeginner kbexpertiseadvanced kbfix kbpubtypekc kbqfe kbhotfixserver KB939780

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