title: WAMP shows error 'MSVCR100.dll' is missing when install
body: <p>When I tried to install <strong>WAMP</strong>, that popped up the following alert,
  <img src="https://i.stack.imgur.com/C1dkH.png" alt="MSVCR100.dll is missing"></p>
  
  <p>I clicked <strong>OK</strong>, it continued to install WAMP. When I start, the WAMP logo is always 'yellow'. It isn't turning 'green', meaning there's something wrong. What exactly is the <code>MSVCR100.dll</code> file? How do I obtain it and fix this error?</p>