The Microsoft Web Platform Installer (Web PI) simplifies the discovery and installation of the Microsoft Web Platform. The Web PI is a free tool that makes it simple to download and install the latest version of Microsoft Web Platform components and applications, including the IIS 7, SQL Server Express, .NET Framework, Visual Web Developer, and ASP.NET and PHP community Web applications that run on your computer running Windows XP, Windows Server 2003, or later versions of Windows.

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