title: HTTP module load error Node.js
body: <p>I am new in Node.js and installed Node.js (version 4.2.1) on Windows 7.
  If I write:</p>
  
  <pre><code>var http = require("http");
  </code></pre>
  
  <p>It says <code>undefined</code>, why it is triggering this error?</p>