title: .NET Framework 4.0 does not install when 4.5 is already installed
body: <p>I use Visual Studio 2012 for a <a href="http://en.wikipedia.org/wiki/Windows_Presentation_Foundation">WPF</a> project needing (at least) .NET Framework 4.0. 
  I have 4.5 already installed, but people with Windows&nbsp;XP cannot install the application (because 4.5 does not run on Windows&nbsp;XP).
  I use <a href="http://en.wikipedia.org/wiki/ClickOnce">ClickOnce</a> as the deployment application.</p>
  
  <p>When I try to intall version 4.0, I get the error (translated from Dutch so the English version might be a bit different):</p>
  
  <blockquote>
    <p>The same or a higher version of .NET Framework 4 is already installed on this computer</p>
  </blockquote>
  
  <p>How can I fix this?</p>