Windows Installer

Software Windows InstallerHelp screen of Windows Installer 5.0 running on Windows 11DeveloperMicrosoftRelease31 August 1999; 27 years ago (1999-08-31)Final release5.0 / 22 July 2009; 17 years ago (2009-07-22) Operating systemWindows 95 or laterPlatformIA-32, x86-64, ARM32, ARM64, ItaniumIncluded withWindows 2000 or laterPredecessorMicrosoft ACME SetupTypeInstallerLicenseFreewareWebsitelearn.microsoft.com/en-us/windows/win32/msi/windows-installer-portal Windows Installer PackageFilename extension .msi, .mspInternet media type application/x-ole-storageDeveloped byMicrosoftType of formatArchiveContainer forInstallation information and an optional .cab file payloadExtended fromCOM Structured StorageOpen format?No Windows Installer (msiexec.exe, formerly named Microsoft Installer, codename Darwin) is a software component and application programming interface (API) of Microsoft Windows, used to install, maintain, and remove software. The installing information, and optionally the related files, are packaged in installation packages, loosely relational databases structured as COM Structured Storages and commonly known as "MSI files", from their default filename extensions. The packages wi