Computer Restarts After You Quickly Insert and Remove a PC Card

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article has been archived. It is offered "as is" and will no longer be updated.
A Microsoft Windows XP-based computer may restart after you quickly insert and remove a PC Card media adapter, and you may receive a "DRIVER_IRQL_NOT_LESS_OR_EQUAL" stop error message (D1, {28, 2, 0, f91faa77}) if a debugger is attached.
Inserting or removing a PC Card calls several Pcmcia.sys driver functions. The Pcmcia driver also keeps track of the child devices that are attached (or removed) in private memory. The private memory is updated with the latest status of the attached (or removed) devices. However, there is a race condition in the Pcmcia driver. If you remove the device immediately after you insert it, the private memory is not initialized correctly. An attempt to access a field that is not valid in the private memory causes the "DRIVER_IRQL_NOT_LESS_OR_EQUAL" error message.

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 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: 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 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   Platform   ----------------------------------------------------------------   20-Mar-2003  22:28  5.1.2600.1188  115,840  Pcmcia.sys  i386   20-Mar-2003  22:28  5.1.2600.1188  308,992  Pcmcia.sys  IA64
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.

Article ID: 816500 - Last Review: 02/27/2014 18:43:17 - Revision: 2.6

Microsoft Windows XP Home Edition, Microsoft Windows XP Home Edition SP1, Microsoft Windows XP Professional, Microsoft Windows XP Professional SP1

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