Love Child
One Love
So If I am not here, that is Why!
Elevate (rulers, thin pieces of Styrofoam, etc.) your laptop on a flat surface (desk) and make sure the case is clean of dust and debris. If it takes a while for your laptop to overheat, you can toss it in the freezer for 1-2min to rapidly cool it down and plug it in again. Do not let the laptop sit in the freezer for more than a few minutes or you risk ice crystals on blah blah blah bad stuff gonna happen.
Also, desktops are superior in almost every way. Laptops have virtually ZERO airflow. One last note, constantly charging a laptop will cause it to heat faster and decay the battery quicker; to the point where you have to always charge it because of how quick the charge decays. Hopefully your laptop can run for ~2 hours unplugged. Ever notice how hot your phone gets when you talk on it while it's charging? Same thing. Charging causes heat.
I've got one of those super blower thingiebobs that blasts dust out of the innards of my laptop, that usually helps.