I have a Toshiba Qosmio F50-10k since 2009 and even if its still in good condition (apart from a few burned pixels) it has a major problem from day 1: Overheating! And I'm talking about overheating to the point of shutting down on its own. Pretty bad because I lost a hard drive from that. I've sent it to service quite a few times but Toshiba refused to change the defective graphics card (that's the one that overheats) - processor doesn't even break a sweat, all work goes to the graphic card.

Here are the specs:

Toshiba Qosmio F50-10k
Intel Core Duo 2.53GHz
4 Gb RAM
650Gb HDD
NVIDIA GeForce 9600M GT
Windows Vista 32bit

Anyway, I'm looking for an update (not necessarily top notch),
An I5 is good (I7 better) <<no I3 because they are no different than a Core Duo>>
But I need to know if there are specific brands and/or models that have less overheating issues.

I'm not looking for a laptop with no overheating issues because there is none. And I'm certainly not considering a desktop (I travel a lot so don't mention it),
I just want to known if there are laptops that have a better management in heat issues.

Is there a laptop (under 1000$) that can handle GTA IV (for example) without shutting down?

From what I've heard until now ASUS ROG and MSI are the best in this department. They're a bit pricey though.
Does anyone have any experience with DELL or LENOVO?

And should I trust Windows 10? It is said that they are a resource hog and filled with bugs. Should I go for them or a FreeDOS system?