I think you may need to clean out the inside. Your fan(s) may be blocked by dust. There's some air spray thingy you can buy for around $5 that will probably do the trick. I would also probably buy a laptop cooler to assist. Geek Squad [BestBuy] are only out for your money.. by the way.
i took the ho thing aprt got rid of the dust. i found that on both cpu and gpu had tried out thermal past and i had a guy replace it with as5 but the gpu, i need to replace that too but my friend ran out of thermal paste