Microsoft KB Archive/887181

= Virtual PC stops responding when you run multiple virtual machines by using Virtual PC 2004 =

Article ID: 887181

Article Last Modified on 4/7/2006

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APPLIES TO


 * Microsoft Virtual PC 2004
 * Microsoft Virtual PC 2004 Service Pack 1

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SYMPTOMS
When you run multiple virtual machines by using Microsoft Virtual PC 2004, Virtual PC may stop responding.



CAUSE
This problem occurs when you run multiple guest operating systems whose combined RAM configuration is larger than 2 gigabytes (GB). There is a deadlocking issue in the Virtual PC memory aperture list that is used to keep track of the guest operating system’s memory.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 Virtual PC service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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.

Prerequisites
To install this hotfix, you must have Microsoft Virtual PC 2004 Service Pack 1 installed. For information about how to download and install Virtual PC 2004 Service Pack 1, visit the following Microsoft Web site:

http://www.microsoft.com/downloads/details.aspx?FamilyID=b07c9ef0-265a-4237-ae3b-25bc8937d40f

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 tool in Control Panel.

  Date         Time   Version         Size       File name --  12-Nov-2004  08:17  5.3.582.31      4,000,464  Virtual PC.exe



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 number to view the article in the Microsoft Knowledge Base:

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

Additional query words: VPC VPC2004 VM

Keywords: kbbug kbfix kbqfe kbmemory atdownload kbhotfixserver KB887181

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