I am trying to compile a solution targeted for .NET Framework 4.0 on a machine that already has a full install of VisualStudio 2012 with .NET Framework 4.5. When I try to install the 4.0 I am not able to. How do I install .NET 4.0 on this machine? I cannot change the solution at this time to target 4.5 - it must target 4.0 for now.
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