I have thought my Surface was a little warm. (I just got it Monday night!) And I could always hear the fan running. I mean most of the time the fan was running. I figured it was because it was doing all the updates and downloads? Tonight I was reading a magazine in the Nook App and it shut itself down. When I clicked the on power button I got a black screen with a white thermometer icon. What just happened? I guess I call MS Tech Support?