Error message when you install SQL Server 2005 Service Pack 1 on an instance of SQL Server 2005 when the computer is also running an instance of SQL Server 2005 Service Pack 2: "SqlSupport.msp is not digitally signed"
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Bug #: 494737 (SQLBUDT)
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows registry
Consider the following scenario. A computer is running an instance of the original release version of Microsoft SQL Server 2005. The computer is also running an instance of SQL Server 2005 Service Pack 2 (SP2). You install SQL Server 2005 Service Pack 1 (SP1) on the instance of the original release version of SQL Server 2005. In this scenario, you receive the following error message when the Setup program installs the Setup Support Files component:
A recently applied update, KB913090, failed to install.
Additionally, the following error message is logged in the Redist9_Hotfix_KB913090_SqlSupport.msp.log file:
SqlSupport.msp is not digitally signed.
To work around this problem, follow these steps.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Save the value data of the following registry key: