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Windows Installer 3.1 (v2)

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Windows Installer 3.1(v2)
Article ID:893803
Last Review:May 13, 2005

• Microsoft Windows Installer 3.1
• Microsoft Windows XP Professional
• Microsoft Windows XP Professional SP1
• Microsoft Windows XP Professional SP2
• Microsoft Windows 2000 Service Pack 3
• Microsoft Windows 2000 Professional SP4
• Microsoft Windows 2000 Service Pack 3
• Microsoft Windows 2000 Server SP4
• Microsoft Windows Server 2003, Standard Edition
• Microsoft Windows Server 2003, Enterprise Edition
• Microsoft Windows Server 2003, Datacenter Edition
• Microsoft Windows XP Home Edition
• Microsoft Windows XP Home Edition SP1
• Microsoft Windows XP Home Edition SP2

New features in Windows Installer 3.1
• New minor UpdateTargetRTMProperty property: Patch files can now target both the original release baseline and the latest service-pack-level baseline that is on the system.
• New MsiSetExternalUIRecord API: Packages that use an external user interface can now receive messages as records instead of receiving the messages as strings.
• New x64 and Msix64 properties: Packages can now use the x64 and Msix64 properties to indicate x64 processor-based operating system support.
• New MsiNotifySidChange API: You can use this API to upgrade the Windows Installer configuration if the security identifier (SID) of a user changes.
• Flyweight patching is now an opt-in behavior: Windows Installer 3.0 introduced new "flyweight patching" functionality. By default, this functionality was enabled for all patches. Windows Installer 3.1 now disables this functionality unless you specifically enable the functionality by setting the OptimizedInstallMode property in the MsiPatchMetaData table.

Available through Windows Update!
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