Microsoft KB Archive/900076

= You may experience decreased performance when you run Windows Server 2003 with Service Pack 1 as a guest operating system under Virtual Server 2005 =

Article ID: 900076

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Virtual Server 2005 Standard Edition

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SYMPTOMS
When you upgrade a guest operating system that is running under Microsoft Virtual Server 2005 to Microsoft Windows Server 2003 with Service Pack 1 (SP1), you may experience decreased performance in comparison with the original-release version of Windows Server 2003.



CAUSE
This problem occurs because the Virtual Machine Additions program that is included with Virtual Server 2005 does not have the performance optimizations that are required for Windows Server 2003 with SP1. Virtual Server 2005 was released many months before the release of Windows Server 2003 SP1.



WORKAROUND
To work around this problem, choose one the following options if the following conditions are true:
 * You have Windows Server 2003 SP1 installed.
 * You have performance or product-support problems.

Option 1: Upgrade to Microsoft Virtual Server 2005 Release 2 (R2)
Virtual Server 2005 R2 is now available. For more information, visit the following Web site:

http://www.microsoft.com/virtualserver

After you install Virtual Server 2005 R2 is installed, follow the steps in Option 2 for updating the Virtual Machine Additions

Option 2: Upgrade the Virtual Machine Additions that are installed in the guest operating system
Updated additions are available from the Microsoft Download Center. After you apply the update to your Virtual Server 2005 installation, upgrade the Virtual Machine Additions that are installed in the guest operating system:
 * 1) Open the Administration Web site. For information about how to do this, see the &quot;Notes&quot; section.
 * 2) Under Status, point to the virtual machine name, and then click Remote Control.
 * 3) In the guest operating system, open Add/Remove Programs, select the Virtual Machine Additions, and then click Uninstall.
 * 4) When you re prompted to restart, select Restart.
 * 5) On the host computer, open the Administration Web site.
 * 6) In the navigation pane, under Virtual Machines, point to Configure, and then click the appropriate virtual machine.
 * 7) In Status, point to the virtual machine name, and then click Turn On.
 * 8) AFter the virtual machine has started, point to the virtual machine name, and then click Remote Control.
 * 9) Log on to the virtual machine as an administrator or member of the Administrators group.
 * 10) After the guest operating system has loaded, press the host key to release the mouse pointer.
 * 11) In the lower-left corner, under Navigation, click Configure  .
 * 12) In Configuration, click Virtual Machine Additions, click Install Virtual Machine Additions, and then click OK.
 * 13) Under Status, point to the virtual machine name, and then click Remote Control.
 * 14) Click in the Remote Control window to return to the guest operating system. The Virtual Machine Additions installation Wizard will start. Continue through the wizard.
 * 15) After the wizard is complete, you will be prompted to restart the virtual machine to complete the installation.

Option 3: Revert to Windows Server 2003
If the first two options are not appropriate for your situation, you can revert the guest operating system to Windows Server 2003.



MORE INFORMATION
For more information about the Virtual Server 2005 SP1 Beta Program, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/bb738033.aspx

Keywords: kbtshoot kbperformance kbqfe kbservicepack kbprb kbhotfixserver KB900076

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