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Article ID: 974028 - Last Review: August 27, 2009 - Revision: 1.1

SYMPTOMS

Pagefile settings are stored in the following registry entry on a computer that is running Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PagingFiles
If you run the following command, the REG_MULTI_SZ value of this registry entry is set to "C:\pagefile.sys 0 0":
wmic computersystem set AutomaticManagedPageFile=FALSE
This issue causes the loss of existing pagefile settings for operating systems that have the following pagefile settings:
  • The initial and maximum pagefile sizes are explicitly specified.
    For example:
    C:\pagefile.sys 4095 4095
  • Multiple pagefiles are on multiple volumes.
    For example:
    C:\pagefile.sys 8200 8200
    D:\pagefile.sys 8200 8200
    E:\pagefile.sys 8200 8200
Note The problem also occurs if the AutomaticManagedPagefile property of the WMI Win32_ComputerSystem class is set to "FALSE" by program code by using the COM interface.

WORKAROUND

Method 1
Confirm the current setting of the page file by running the following command:
wmic computersystem get AutomaticManagedPageFile
Also, avoid setting the value to "FALSE" if it is already set to "FALSE."

Method 2
Run VBScript code instead of the wmic command to disable the AutomaticManagedPageFile property. To do this, follow these steps:
  1. Start Notepad.
  2. Paste the following code into Notepad:
    strComputer = "."
    Set objWMIService = GetObject("winmgmts:" _
        & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
    
    For Each objCS in objWMIService.ExecQuery("SELECT * FROM Win32_ComputerSystem")
        on Error Resume Next
    '    Wscript.Echo "AutomaiticManagedPagefile: " & objCS.AutomaticManagedPagefile
        If (objCS.AutomaticManagedPagefile) Then
            Wscript.Echo "Setting AutomaticManagedPagefile to False"
            objCS.AutomaticManagedPageFile=False
            objCS.Put_
        Else
            Wscript.Echo "AutomaticManagedPagefile was already False. Just leaving"
        End If
    '    Wscript.Echo "AutomaiticManagedPagefile: " & objCS.AutomaticManagedPagefile
    Next
    
  3. On the File menu, click Save as.
  4. Select a destination, type AutomaiticManagedPagefile.vbs in the File name box, and then click Save.
  5. Run the AutomaiticManagedPagefile.vbs script on your computer.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

The WMI provider of the Win32_ComputerSystem class is implemented in CimWin32.dll. This .dll file changes the following registry value when the AutomaticManagedPageFile property of the WMI Win32_ComputerSystem class is changed:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PagingFiles
If the AutomaticManagedPageFile property is set to TRUE, the value is set to "?:\pagefile.sys." If the AutomaticManagedPageFile property is set to FALSE, the value is set to "c:\pagefile.sys 0 0." Therefore, any other page file settings are overwritten when this issue occurs.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
959516  (http://support.microsoft.com/kb/959516/ ) Multiple pagefiles are created when you set the AutomaticManagedPagefile property of the Win32_ComputerSystem class to False on a computer that is running Windows Server 2008 or Windows Vista Service Pack 1

APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Starter
  • Windows Vista Ultimate
  • Windows Vista Business
Keywords: 
kbtshoot kbsurveynew kbexpertiseinter kbinfo KB974028
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