title: Calling dir in cmd prints out: "Volume in drive C has no label."
body: <p>I run a Windows 10 System and whenever I call <code>dir</code> on cmd I get this message:</p>
  
  <pre><code>Volume in drive C has no label.
  Volume serial number: 5A4F-9364
  </code></pre>
  
  <p>German original:</p>
  
  <pre><code>Volume in Laufwerk C: hat keine Bezeichnung.
  Volumeseriennummer: 5A4F-9364
  </code></pre>
  
  <p>What does it mean and how do I fix it?</p>