Download Microsoft .NET Framework 4.5.1 (Web Installer) for Windows Vista SP2, Windows 7 SP1, Windows 8, Windows Server 2008 SP2 Windows Server 2008 R2 SP1 and Windows Server 2012 from Official Microsoft Download Center

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Microsoft .NET Framework 4.5.1 (Web Installer) for Windows Vista SP2, Windows 7 SP1, Windows 8, Windows Server 2008 SP2 Windows Server 2008 R2 SP1 and Windows Server 2012

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The Microsoft .NET Framework 4.5.1 is a highly compatible, in-place update to the Microsoft .NET Framework 4 and the Microsoft .NET Framework 4.5. The web installer is a small package that automatically determines and downloads only the components applicable for a particular platform.