The thing no one seems to be acknowledging is the fact that you said the device was very warm. As a rule devices with ARM processors should not get particularly warm even under heavy load and certainly not when they should have been off. Like all devices though, they can still overheat particularly if there is a defective component. What you described is some of the random stuff that occurred after my original Surface RT tablet overheated last year. Microsoft subsequently confirmed it was either a defective processor that damaged the system by overheating or was some other board failure that triggered the processor to overheat and shipped me a replacement unit. If you did not change any settings and the only notable event prior to you finding them changed was a hot device, be aware you might start finding other problems and/or random events down the line. BTW, when I contacted Microsoft last year about the Surface RT and said it had gotten warm to the touch and subsequently had random display quirks they didn't even ask any further questions. They simply confirmed my address to ship a replacement....