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Known issue with this security updateInternet Information Services (IIS) 5.1 is an optional component in Microsoft Windows XP Professional Service Pack 2 (SP2). Windows Update offers this security update only if the IIS 5.1 component is installed on the computer.
If you download this security update from the Microsoft Download Center and manually try to install this security update on a Windows XP Professional SP2-based computer that does not have the IIS 5.1 component installed, you receive an error message. This error message indicates that a prerequisite is missing and that the security update will not be installed. This behavior is expected.
You can use the /quiet switch to suppress all messages.
Administrators should use one of the supported methods to verify that the installation is successful when they use the /quiet switch. Administrators should expect to receive error messages in the Kb939373.log file when the IIS 5.1 component is not installed.
Article ID: 939373 - Last Review: Jul 10, 2007 - Revision: 1