title: How to make Visual Studio 2010 + 2012 + 2013 coexist together?
body: <p>On my current machine , I need to have Visual Studio 2010 , 2012 &amp; 2013 . Together . </p>
  
  <p>How can I make them coexist together , without one of them causing problems to the other ? Like one big happy family ...</p>
  
  <p>Much appreciated </p>