title: Windows 8.1: Vagrant could not detect VirtualBox! Make sure VirtualBox is properly installed
body: <p>This question is one that I will answer in the hope that anyone with the same problem will be able to fix the problem without too much head banging like I did!</p>
  
  <p>I'd just installed VirtualBox (4.3.16) and Vagrant (1.3.5) as per the instructions on their site. All seemed pretty clear and easy until I got to the point of running the command: vagrant up</p>
  
  <p>This immediately returned the error:</p>
  
  <pre><code>Vagrant could not detect VirtualBox! Make sure VirtualBox is properly installed.
  
  Vagrant uses the `VBoxManage` binary that ships with VirtualBox, and requires
  this to be available on the PATH. If VirtualBox is installed, please find the
  `VBoxManage` binary and add it to the PATH environmental variable.
  </code></pre>
  
  <p>This is an amazing error message... Where am I supposed to find this PATH variable???</p>