A number of issues have now been reported on the Microsoft Surface community forum where it appears that a firmware update for the Surface RT has resulted in problems for users.
Here’s a report of the problem:
Cannot access the windows store or windows update periodically since the latest patch. I did a refresh, then it worked. Then overnight, it stopped working again, and restart gets it working again.
[1/17/2013 update] – windows update does not connect again from metro ui, or desktop, nor does store. restart gets it working again.
According to the various reports, it would seem that Surface RT owners have had Windows Update refuse to successfully load or search for updates. It is believed a reboot sometimes fixes the issue, but occasionally the Windows updates stop working again. Other users are reporting problem with the standard app updates; this makes us believe that the problem could be part of the same issue, but we aren’t Microsoft and we have no definite answer on what exactly the problem is.
This bug has been experienced since the 10th of January and users are currently still awaiting a fix from Microsoft. If you have a Surface RT, let us know if you have experienced any problems with Windows Update or app updates.
Source: The Next Web