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MSI File Format

Installer package (Microsoft Windows)

MSI file format

MSI is an installer package file format used by Windows. Its name comes from the program’s original title, Microsoft Installer, which has since changed to Windows Installer. MSI files are used for installation, storage, and removal of programs. The files are contained in a package, which is used with the program’s client-side installer service, an .EXE file, to open and install the program.

MIME: application/x-ole-storage, text/mspg-legacyinfo

Learn more about .MSI files:

Learn how to create your own MSI file to deploy applications.

Search for answers to .MSI-related questions on IT Knowledge Exchange.

This was last updated in August 2011
By Margaret Rouse
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