On a computer that is running Windows Server 2003 and that has more than 4 CPU cores, you install Microsoft ISA Server 2006 Standard Edition.
You install the MS09-012 update. For more information about the MS09-012 update, click the following article number to view the article in the Microsoft Knowledge Base:
959454 MS09-012: Vulnerabilities in Windows could allow elevation of privilege
You restart the computer.
In this scenario, the Microsoft ISA Server Control service cannot start. Additionally, Event ID 14109 is logged in the Application log.
This problem occurs if certain hotfixes were installed before you install the security update. If the security update detects that these hotfixes are installed, the security update adds functionality that changes how Windows reports the number of CPUs that are available. This change was introduced in hotfix 932730. The change causes Windows Server 2003 to report the number of CPUs exactly how Windows Vista and Windows Server 2008 report the number of CPUs. Therefore, when Windows Server 2003 reports more than four CPU cores, the ISA Server Control service interprets this as more than four CPUs. This triggers an alert that shuts down the Microsoft ISA Server Control service and any dependent services.
Note Hotfix 932730 was not included with any Windows Server 2003 service pack. For more information about hotfix 932730, click the following article number to view the article in the Microsoft Knowledge Base:
932370 The number of physical hyperthreading-enabled processors or the number of physical multicore processors is incorrectly reported in Windows Server 2003
To resolve this problem, install the hotfix rollup package that is described in the following Microsoft Knowledge Base article:
970443 Description of the ISA Server 2006 hotfix package: Description of the ISA Server 2006 hotfix package: April 21, 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
ISA Server uses the Windows GetLogicalProcessorInformation API to determine the number of logical processors. The update that is provided by hotfix 932370 changes how Windows Server 2003 reports CPU cores.