Download Microsoft .NET Framework 3.5 SP1 Update for Windows 7 and Windows Server 2008 R2 for x64-based Systems from Official Microsoft Download Center

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Microsoft .NET Framework 3.5 SP1 Update for Windows 7 and Windows Server 2008 R2 for x64-based Systems

This update addresses a set of known issues of the Microsoft .NET Framework 3.5 Service Pack 1.