Heating Again!!

So about every 2-3 months, my laptop start to heat up then turn off. I asked eMachines what the heck is the problem. They said they don’t know. I send it to them about every 2-3 months cause of this. WHy does this happen to me? Is this normal with laptops!!!

Here the pictures of how it happens.
I boot it up.
http://i127.photobucket.com/albums/p146/pinknick2/0106071255.jpg

I go to the internet.
http://i127.photobucket.com/albums/p146/pinknick2/0106071256.jpg

It Turns off.
http://i127.photobucket.com/albums/p146/pinknick2/0106071257.jpg

Thanks all,
Nick

Ps: Its a eMachines M5310