The RTM release of the Windows SDK for Windows 7 and .NET Framework 3.5 SP1 is now available for customers to install from the download center in both ISO and Web Setup format. See the SDK announcement on the Windows SDK blog.
Please note that the stand-alone version of the Windows Installer 4.5 SDK is now no longer available for download from the Microsoft download center. Windows Installer SDK has traditionally always been included with the Windows SDK, but during the timeframe for the release of MSI 4.5 redistributable there was no other Windows or Windows update release for simultaneously shipping the SDK.
We encourage you to download and use the latest version of the Windows Installer SDK tools (Windows Installer 5.0) included with the RTM release of Windows SDK for Windows 7.
[Author: Zainab Hakim]This posting is provided "AS IS" with no warranties, and confers no rights. Use of included script samples are subject to the terms specified at http://www.microsoft.com/info/cpyright.htm.