Microsoft KB Archive/842840

= &quot;STOP 0x000000D1&quot; error message when Windows Server 2003 is under a heavy network load =

Article ID: 842840

Article Last Modified on 11/10/2005

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems

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SYMPTOMS
Your Microsoft Windows Server 2003-based computer may intermittently stop responding (hang), and you may receive a &quot;STOP D1 (DRIVER_IRQL_NOT_LESS_OR_EQUAL)&quot; error message on a blue screen that is similar to the following:


 * STOP 0x000000D1 (parameter1, parameter2, parameter3, parameter4) Tcipip.sys



CAUSE
This problem may occur during a period of high network use. The problem is most likely to occur on a Windows Server 2003-based computer that uses two or more processors or that uses a single processor with hyperthreading enabled. The problem occurs because, during the fast retransmit of a segment, the segment has already been acknowledged with a TCP acknowledgment (ACK).



RESOLUTION
To resolve this problem, download and install the hotfix that is described in the following Microsoft Knowledge Base article:

840711 A NULL IP address is assigned to the network adapter in a Windows Server 2003-based computer



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 additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

816915 New file naming schema for Microsoft Windows software update packages

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kberrmsg kbbug kbfix kbqfe kbexchange2003presp1fix KB842840

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