I have an Athlon XP 2500+ processor on a Foxconn motherboard. My computer was fine at first it would run around 60 degrees Celsius with the side panel off. Then yesterday my computer kept forcefully shutting down. I checked to see what my temperature was then I seen it at 102 degrees Celsius. I immediately shut down my computer, cleaned the whole thing with an air duster, and it continues running at 90 degrees. I have a fan and it runs around 4500 rpm. Why is my CPU running hot so suddenly? What do I have to do to fix it?