Virtual Server 2005 R2 Service Pack 1 does not support Windows Server 2008, Windows Vista Service Pack 1, or Windows XP Service Pack 3

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SYMPTOMS

Microsoft Virtual Server 2005 R2 Service Pack 1 (SP1) does not support the following host and guest operating systems:

Windows Server 2008
Windows Vista Service Pack 1 (SP1)
Windows XP Service Pack 3 (SP3)

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RESOLUTION

To resolve this issue, install update 948515. To do this, visit the following Microsoft Web site:

http://www.microsoft.com/downloads/details.aspx?FamilyId=A79BCF9B-59F7-480B-A4B8-FB56F42E3348&displaylang=en (http://www.microsoft.com/downloads/details.aspx?FamilyId=A79BCF9B-59F7-480B-A4B8-FB56F42E3348&displaylang=en)

Notes

To install this update, save the .msp file locally.

If you are running Windows Vista, Windows Vista Service Pack 1, or Windows Server 2008, run the update from an elevated command prompt. To do this, use the following command syntax:
msiexec /p path of .msp file
If you are running an earlier version of Windows, double-click the downloaded .msp file to start the installation process, and then follow the installation instructions.
Virtual server Web applications are not supported on the Windows Server 2008 Core.

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Additional host operating systems that the update supports

Update 948515 for Virtual Server 2005 R2 SP1 includes support for the following additional host operating systems:

Windows Server 2008, Core Edition
Windows Server 2008, Standard Edition
Windows Server 2008, Datacenter Edition
Windows Server 2008, Enterprise Edition
Windows Vista Ultimate with Service Pack 1 (SP1) (nonproduction use only)
Windows Vista Business with Service Pack 1 (SP1) (nonproduction use only)
Windows Vista Enterprise with Service Pack 1 (SP1) (nonproduction use only)
Windows XP Professional with Service Pack 3 (SP3) (nonproduction use only)

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Additional guest operating systems that the update supports

Update 948515 for Virtual Server 2005 R2 SP1 includes support for the following additional guest operating systems:

Windows Server 2008, Core Edition
Windows Server 2008, Standard Edition
Windows Server 2008, Datacenter Edition
Windows Server 2008, Enterprise Edition
Windows Vista Ultimate with SP1
Windows Vista Business with SP1
Windows Vista Enterprise with SP1
Windows XP Professional with SP3

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MORE INFORMATION

Update information

Prerequisites

To install update 948515, you must have Virtual Server 2005 R2 SP1 installed.

Restart requirement

You do not have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

Issues that the update fixes

This update fixes the following issues:

941125 (http://support.microsoft.com/kb/941125/ ) The Virtual Server service may stop responding when the service is starting if one or more of the virtual machines are configured to automatically start when the Virtual Server service starts

943666 (http://support.microsoft.com/kb/943666/ ) In Virtual Server 2005 R2, virtual machines that are running Windows Vista guest operating systems display a "Stop 0x000000D1" error message and then restart unexpectedly

943487 (http://support.microsoft.com/kb/943487/ ) The Vhdmount.exe tool in Virtual Server 2005 R2 Service Pack 1 may be unable to mount all volumes on a VHD file on a Windows Server 2003-based, a Windows Server 2008-based, or a Windows Vista-based computer

Known issues with this update

You cannot use VMRC to connect to Virtual Server through a proxy server

The Virtual Machine Remote Control (VMRC) client does not support connection to Virtual Server through a proxy server. To connect to Virtual Server, you must be running the Microsoft Internet Security and Acceleration (ISA) Server firewall client on the local computer, or you must have a direct Internet connection.
Cluster options are not available for Virtual Server on Windows Server 2008

Cluster options for Virtual Server are available on Windows Server 2003. However, cluster options for Virtual Server are not available on Windows Server 2008.
Floppy disk access from a guest operating system is not supported on Windows Server 2008

When you use Virtual Server on Windows Server 2008, the guest operating system cannot access the physical floppy disk on the host operating system.
A physical media change is not reflected in the guest operating system

When you use Virtual Server on Windows Server 2008, the guest operating system may be unable to reflect the change in the physical media. To resolve this issue, you have to reassign the CD or the DVD to the virtual machine from the Administrator Web site.
You experience issues with the VHDMount.exe tool on virtual hard disks that are configured as dynamic disks on Windows Server 2008

In Windows Server 2008, you mount a virtual hard disk (VHD) that is configured as a dynamic disk. The dynamic disk contains one or more volumes that are spread across multiple disks. However, the dynamic disk or the volumes do not appear online. In some scenarios, mirrored volumes may be broken into simple volumes.
The host system stops responding

An issue occurs with the VHDMount.exe tool in which the host system stops responding when the host system copies large files.
Problems occur when you try to mount VHD files by using the Vhdmount.exe tool

When you try to mount VHD files by using the Vhdmount.exe tool, you may receive an error message, or another problem may occur. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
953482 (http://support.microsoft.com/kb/953482/ ) You experience problems when you try to mount VHD files by using the Vhdmount.exe tool after you apply update 948515 in Virtual Server 2005 R2 S