title: Force the System's Default .NET Framework to Prior Version
body: <p>Is there a way to make my programs open by default with .NET Framework 3.5 instead of 4.0 on Windows 7 (unless the application was specifically targeted at 4.0)?</p>
  
  <p>(Note: I am <strong>not</strong> asking for project targets; I'm asking for a system-wide switch, independent of the application.)</p>