http://www.microsoft.com/downloads/details.aspx?familyid=AB99342F-5D1A-413D-8319-81DA479AB0D7&displaylang=en Microsoft .NET Framework 3.5 Service Pack 1 Brief Description Microsoft .NET Framework 3.5 Service Pack 1 is a full cumulative update that contains many new features building incrementally upon .NET Framework 2.0, 3.0, 3.5, and includes cumulative servicing updates to the .NET Framework 2.0 and .NET Framework 3.0 subcomponents. Quick Details File Name: dotnetfx35.exe Version: SP1 Date Published: 11/18/2008 Language: English