title: Windows + Xampp + CakePHP - Composer throws error on update
body: <p>I am trying to create a local development environment on a Windows machine using Xampp. Xampp has been setup correctly and I am able to access <code>localhost</code>, <code>locahost/phpmyadmin</code> and a virtual host I created <code>domain.local</code>. This Virtual Host is a CakePHP application that I had been running on a Linux Box (nginx). I use that code to setup the site, but when I try to run </p>
  
  <p><code>php composer.phar update</code> </p>
  
  <p>to have composer download all dependencies, I get the following error:</p>
  
  <pre><code>Fatal error: Class 'Cake\Composer\Installer\PluginInstaller' not found in
  phar://C:/Users/admin/Documents/Sites/domain.local/website/composer.phar/src/Composer/Plugin/PluginManager.php
  on line 244
  </code></pre>
  
  <p>I have tried a bunch of things without success.</p>
  
  <p>Also to note <code>php composer.phar self-update</code>, runs without issue.</p>
  
  <p>Not sure what to do at this point. Any help is appreciated.</p>