title: What's the deal with MSVCR DLL?
body: <p>What is it for ?</p>
  
  <p>Why are their various versions of it ? What are the available versions and what each of them match what ?</p>
  
  <p>Why it seems to cause licence problems ? E.G : I some tools such as py2exe can't bundle them but you still need them to run the resulting exe.</p>
  
  <p>How to solve that if you want to distribute a software for Windows :</p>
  
  <ul>
  <li>technically : how to make sure the user has one ? If not how to provide one ? For all version of Windows.</li>
  <li>legally : does it work the same for free software ? For profit software ? Is there something specific to do ?</li>
  </ul>