If you just got your Surface RT recently (let's just say starting December 5, 2012...) and try to run windows update you might get an error with the cryptic code 8024004C. As of typing this, it's 'unreported' in Google or Bing. I got it and was initially worried but I looked at the list of updates and saw the Firmware update in the list of scheduled updates. I unchecked the Firmware update and kept the optional update of Microsoft Office unchecked, Re-Tried updating and the updates worked. I am assuming the Firmware update needs some of the other updates to be in place. The updates are still going on. Will update this post, when I am able to install the firmware update!