SQL 2005 on Windows XP SP3 - MSXML6 Error

Problem:
With a fresh Windows XP SP3, I cannot install SQL 2005. The error message in log file is:

Property(S): SupportedOSMessage = Installation of this product failed because it is not supported on this operating system. For information on supported configurations, see the product documentation.
Property(S): ShortCutText = MSXML 6 Service Pack 2 (KB973686)
Property(S): DialogTitle = MSXML 6 Service Pack 2 (KB973686) Setup
Property(S): ProductName = MSXML 6 Service Pack 2 (KB973686)
Property(S): ShortName = MSXML 6 Service Pack 2 (KB973686)
Property(S): WrongPackage = This MSXML6 Service Pack 2 (KB973686) package is not supported on the current processor type.
Property(S): DialogPatchTitle = MSXML 6 Service Pack 2 (KB973686) Patch
Property(S): SystemFolder = C:\WINDOWS\system32\

...

MSI (s) (04:A8) [09:38:47:725]: Product: MSXML 6 Service Pack 2 (KB973686) -- Configuration failed.

MSI (s) (04:A8) [09:38:47:725]: Windows Installer reconfigured the product. Product Name: MSXML 6 Service Pack 2 (KB973686). Product Version: 6.20.2003.0. Product Language: 1033. Reconfiguration success or error status: 1603.

Solution:
Luckily, I am not the first one who saw this problem. This problem seems to be around for a while now. There is a nice Microsoft KB article for this exact problem, and the solution is to use "Windows Installer CleanUp utility" to remove existing MSXML then install SQL 2005.

And, IT WORKS!!

Reference: MSKB 968749 http://support.microsoft.com/kb/968749