I'm asking this for a friend, he has problems with cooling his laptop (he had a problem that we think it's graphic-card related, a lot of vertical stripes and screen flickring probably due to overheating) and he was looking for a good laptop-support with cooling system that can survive to 5Kg (yea it weights a lot) and has a 17'' screen (I don't know the size of the computer)
About the graphic card, because his computer is in warranty, he can eventually change it. Do you think it's a production problem or just something caused to overheating? (or can be something relateed to water, it's raining a lot here and his computer was a bit wet even in the bag)
just raise the laptop 3-5cm, u might use some laptop stand, or just make it yourself somehow. a few cm lift-off does wonders for a laptop. if that doesnt help, there are cheap laptop stands +- cooler on them. but i do think that u should not have any heat issues as it is. maybe also check for dust ?