FIX: Error message when you run a Windows Sockets application that opens many connections on a Windows XP Embedded-based device: "Stop 0x00000044"

On a Windows XP Embedded-based device, you run a Windows Sockets (WinSock) application that opens many connections. When you do this, you receive a Stop error message that resembles the following:
STOP 0x00000044 (parameter1, parameter2, parameter3, parameter4)
This problem occurs when multiple instances of the application are running at the same time.
This problem occurs because a race condition exists in the Ancillary Function Driver (AFD) driver (Afd.sys). In this scenario, an I/O request packet (IRP) is freed prematurely. Therefore, later tries to free the same IRP fail.

Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may 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 immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


To install this hotfix, you must have either Windows XP Service Pack 2 (SP2) or Windows XP Service Pack 3 (SP3) installed. For more information about how to obtain the latest Windows XP 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

Restart requirement

You have to 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 item in Control Panel.
File nameFile versionFile sizeDateTimePlatformSP requirement
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, 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

Article ID: 975167 - Last Review: 10/07/2011 16:09:00 - Revision: 2.0

Windows XP Embedded

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