What is Microsoft Windows Installer?
(Page 2 of 4 ) Windows Installer is an installation and configuration service shipped with Microsoft Windows .NET Server family, Windows XP, Windows 2000, and Windows Me. The installer is also provided as a service pack to Microsoft Windows NT version 4.0, Windows 98, and Windows 95. An installation package contains all of the information that the Windows Installer requires to install or uninstall an application or product and to run the setup user interface. Each installation package includes an .msi file, containing an installation database, a summary information stream, and data streams for various parts of the installation. The .msi file can also contain one or more transforms, internal source files, and external source files or cabinet files required by the installation. Windows Installer allows you to roll back the installation depending on some conditions and returns the computer to its original state. It also supports self-repair, which could be used to reinstall missing file(s