After you apply the following Microsoft XML Core Services (MSXML) 6.0 update on a computer that is running Windows XP, you upgrade the computer to Windows XP Service Pack 3 (SP3):
954459 MS08-069: Description of the security update for XML Core Services 6.0: November 11, 2008
When you try to install Microsoft SQL Server 2005 in this scenario, you receive the following error message:
Installation of MSXML 6 Service Pack 2 (KB954459) failed because a higher version already exists on the machine. To proceed, uninstall the higher version and then run MSXML 6 Service Pack 2 (KB954459) Setup again.
Additional error information The error message resembles the following:
If you examine the SQL Server setup log file, you find that the following error has been logged:
This package is not supported on this operating system. SkipInstallCA. Return value 3.
Fatal error during installation MainEngineThread is returning 1603
Extract the fix, and then copy the MSXML6.MSP file and the MSXML_FIX.VBS file to the same folder.
Run cscript MSXML_FIX.VBS.
Method 2: Obtain the latest service pack for SQL Server 2005
To obtain the latest service pack for SQL Server 2005, click the following article number to view the article in the Microsoft Knowledge Base:
913089 How to obtain the latest service pack for SQL Server 2005
When SQL Server Setup tries to install MSXML 6.0 SP2, it detects that the version of MSXML 6.0 that is described in Knowledge Base article 954459 is already installed on the computer. Therefore, the validation process indicates that the current version of MSXML 6.0 should not be replaced. This stops the installation of both MSXML 6.0 and SQL Server 2005.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.