title: Check whether cygwin is installed & install if needed
body: <p>I am trying to run shell scripts in Windows XP using Java. I found that we can run shell scripts using <strong>cygwin</strong> in Windows, but what if it is not installed on the system?</p>
  
  <p>I want to check whether it is installed on machine, if it is not installed - add that software as a part of my application and install it.</p>