I've recently noticed if I just leave my SP3 on, no apps open, and have the screen on, showing the desktop, it becomes hotter than when playing a game or anything else. Of course the fan is on full blast. Right after noticing this I tried to see if I could get the thermometer shut down by playing Starcraft 2... Funny thing is the temp went down and the fan stopped at times. Rebooting does not fix the issue.
I have a screen shot of task manager while it's happening...
I have a screen shot of task manager while it's happening...