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Consider the following scenario. You have an Internet Information Services (IIS) 6.0 web server running on Windows Server 2003 Service Pack 2. The Microsoft update KB982666 and/or Microsoft update KB973917 gets installed on the server. After installing KB98266 and/or KB973917, the IIS 6.0 application pools cannot start up successfully. An inspection of the event logs show that the IIS worker processes are terminating unexpectedly, showing event messages similar to the following:
Event Type: Warning
Event Source: W3SVC
Event Category: None
Event ID: 1009
Time: 10:55:01 AM
A process serving application pool 'DefaultAppPool' terminated unexpectedly. The process id was '1234'.
The process exit code was '0xffffffff'.
In some cases, the IIS application pool(s) are eventually disabled by the Rapid Fail Protection feature. Users who try browsing to the web sites hosted on the server may complain that the web sites are unavailable and cannot be accessed.
Previous to the installation of the KB982666 and/or KB973917 update, one or more of the core IIS .dll files were not at the correct file version. Specifically, the earlier installation of Windows Server 2003 Service Pack 2 on the server did not complete successfully, leaving some of the IIS .dlls at the Service Pack 1 level while bringing others up to the Service Pack 2 level. (This can occur when installing IIS onto a system running Windows Server 2003 Service Pack 2 by pointing the installer to a Windows Server 2003 Service Pack 1 media location). The IIS services had been able to run successfully even with that file mismatch in place. However, the installation of the KB982666 and/or KB973917 update exposes this pre-existing file mismatch environment to the degree that IIS is now unable to function properly.
To resolve this problem, reinstall Service Pack 2 for Windows Server 2003 on the web server. This will bring all IIS 6.0 components up to the correct file versions, and will maintain the installation of the KB973917 update. Reinstalling the KB98266 and/or KB973917 update should not be necessary.
NOTE: Re-installing SP2 will enable Scalable Networking Pack (SNP) Feature that is on by default with Windows 2003 Service Pack 2. When service pack 2 was originally released this caused the issues documented in the following KB: http://support.microsoft.com/kb/948496
It may be necessary to disable the Scalable Networking Pack after re-applying Service Pack 2 to address the issues described in KB 948496
Microsoft has confirmed that this is a problem in the products listed in the Applies To section. After reinstalling Service Pack 2 for Windows Server 2003, verify the file versions of the KB973917 update by reviewing the following article:
Description of the update that implements Extended Protection for Authentication in Internet Information Services (IIS)
Article ID: 2009746 - Last Review: 07/12/2010 21:35:00 - Revision: 17.0
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