Heatsink alert
OK, that means either your heatsink is bad or the Thermal Paste that goes on the heatsink and cpu has either dried up or is too think to keep the unit cool. It can overheat.
On a desktop it's easy to get to. Remove the power cord, remove the case and turn the computer on its side so you can see inside. The heat sink will have a fan on top of it. Remove the screws from the fan and unplug the fan, then remove the heatsink by lifting it out. Sometimes the CPU will come out with the heatsink. Take a small flat head screw driver and carefully pry the cpu from the heatsink if it's attached. The cpu has lots of little prongs or pins on it and it sits in a slot that will accomodate the pins. There is a latch that allows you to put the cpu into the slot that you lift up to place it back in, then close the latch one you have the cpu in place. Put a good coat of thermal paste on the cup and heat sink, put it all back together. If you still get the message then you will need to replace the heatsink.
Look on ebay by just putting in your brand and model of your computer followed by heat sink.
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