Microsoft KB Archive/928955

= A Windows Server 2003 SP1-based computer that is running Virtual Server 2005 R2 randomly stops responding =

Article ID: 928955

Article Last Modified on 11/15/2007

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APPLIES TO


 * Microsoft Virtual Server 2005 R2 Enterprise Edition
 * Microsoft Virtual Server 2005 R2 Standard Edition, when used with:
 * Microsoft Windows Server 2003 Service Pack 1

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SYMPTOMS
A Microsoft Windows Server 2003 Service Pack 1 (SP1)-based computer that is running Microsoft Virtual Server 2005 R2 randomly and repeatedly stops responding. To restore functionality, you must manually reset the computer.

You experience this problem if the following conditions are true:
 * The computer has two or more processors installed.
 * The computer is running a 16-bit program in a Virtual Dos Machine (NTVDM) process.



CAUSE
This problem occurs if a 16-bit program is running in a NTVDM process at the same time that the Virtual Server Vmm.sys process runs. This may cause &quot;infinite spinning&quot; behavior on both of the CPUs in the computer. This CPU behavior occurs at the DISPATCH_LEVEL of processing. Therefore, the computer stops responding.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that this article describes. Apply this hotfix only to systems that are experiencing this specific problem.

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
No prerequisites are required to install this hotfix.

Restart requirement
You do not have to restart the computer when you apply this hotfix. However, you must shut down all running virtual machines to apply this hotfix. Additionally, you must stop the Virtual Server service when 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.

Virtual Server 2005 R2 64-bit editions


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

Keywords: kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB928955

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