The “wmic computersystem set AutomaticManagedPageFile=FALSE” command causes the loss of existing pagefile settings on a Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2-based computer
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.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB974028.