How to stop laptop overheating, if still overheats after cleaning dust.

There is two kinds of overheating.Component specific overheating, caused by CPU or Graphics Processing Unit (GPU).
Overall temperature inside the laptop, caused by HDD and Battery.


99.9% cases its CPU,GPU or North bridge (if no GPU present). But in these 99.9% cases sometimes its not just gets fixed by cleaning the dust from heat-sink vents.

I am assuming you failed to fix overheating problem