Error message when a Windows XP SP2-based or Windows Server 2003-based multiprocessor computer uses driver Battc.sys: "STOP 0x000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL"

When you work with a Windows XP Service Pack 2-based or Windows Server 2003-based multiprocessor computer, you receive an error message that resembles the following: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 is plugged into an uninterruptable power supply (UPS).

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

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.

Prerequisites

To apply this hotfix, you must have one of the following installed:

• Windows XP Service Pack 2 (SP2)
  
  For more information about how to obtain this service pack, click the following article number to view the article in the Microsoft Knowledge Base:
  322389 How to obtain the latest Windows XP service pack
• Windows Server 2003 Service Pack 1 (SP1) or Windows Server 2003 Service Pack 2 (SP2)
  
  For more information about how to obtain this service pack, 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

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Registry information

To use one of the hotfixes in this package, 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, 32-bit versions

Windows Server 2003, 32-bit versions

Windows Server 2003, 64-bit versions

Windows Server 2003, Itanium-based versions

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

For more information, click the following article number to view the article in the Microsoft Knowledge Base: