The Microsoft Windows Installer engine must be present in the operating system before a Windows Installer (.msi) package can be installed. This article describes how to obtain and install the Windows Installer engine if it is not already in the operating system. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
310598 Overview of the Windows Installer technology
Microsoft Windows XP includes Windows Installer version 2.0. Microsoft Windows 2000 includes Windows Installer version 1.1.
893803 Windows Installer 3.1 v2 (3.1.4000.2435) is available