Sometimes the website had technical difficulties. Any errors logged in the Event log? I would suggest reinstalling/installing the latest version of the driver update application. You can get it from the official Dell drivers download site: Dell Drivers You can sort by date so the latest version would be the one listed first. It received it's latest update on August 24th.
Dell driver update not working on Dell website, or Alienware Application, says not available, or no internet connection. And I am surfing the net at the time? You would think that they would get this fixed PRONTO, but no. Been that way for a week or more. Common Dell, you can do better than this.
Aurora R11, Dell Driver update not working