Some of the new laptops / notebooks / netbooks / pads can read the battery and power supply temperature too. Does anything seem to be getting hot when you feel around the case?

Download one of those simple sensor monitoring programs and watch **ALL** your sensors while you are playing games or playing a movie, which should be a pretty good power draw.

It's also possible that a sensor is malfunctioning or went bad. You will find that out when you monitor all the sensors and feel around the case to confirm if things are getting hot.

Another possibility is that your external CPU temperature sensor is only on the heat sink and somehow your CPU has come loose from the heatsink and so the internal CPU temperature sensor (inside the IC chip) is reading high. If that's the case then you need to make sure it's contacting the heat sink correctly and has some sort of thermal compound on it or one of those grey plastic heat transfer pads on it.