Microsoft Windows Installer is a component of the Windows operating system. Windows Installer provides a standard foundation for installing and uninstalling software. Software manufacturers can create the setup of their products to use Windows Installer to help make software installation, maintenance, and uninstallation straightforward and easy.

New and improved features in Windows Installer 4.5

• Multiple package transaction
• Embedded UI handler
• Embedded chainer
• Update supersedence resiliency
• Custom action execution on update uninstall

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