System Requirements
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Supported Operating Systems: Windows 2000, Windows NT
Windows Installer 2.0 Redistributable for Windows NT 4.0 and 2000 supports Windows NT 4.0 with Service Pack 6 or later and Windows 2000.
Windows XP contains Windows Installer 2.0 and therefore can't be installed or upgraded by this redistributable.
source:
http://www.microsoft.com/downloads/d...1-6F8A0F5DCA8F