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

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.