The term laptop became a popular term used to describe older portable computers, as computers did not have very powerful processors and components back in the day(they were top of the line back then)they simply did not generate much heat nor required any cooling devices inside and you could easily put them to rest on your lap and work comfortably from there as they did not generate much heat, they just warmed up a little. Some people are still used to those specs from back in the day.
As portable computers got more powerful they needed to have more powerful components inside that generated more heat and therefore you could not have them sitting on your lap for long. The term laptop although is the popular term to describe portable computers now it is being questioned as you can hardly put them on your lap for extended periods of time due to the heat they generate, now the correct term used for these computers is mobile computers.
However, depending on the processor type and the components that a mobile computer is built on it may generate less heat.
Keep in mind, that the Aurora m7700 like other systems like it regardless of brand generate more heat than say Centrino and Turion based systems because it has a full desktop processor on it, multiple hard drives/optical units, and an NVIDIA 6800/7800 go video card which kicks the pants off integrated motherboard video cards but indeed does generate more heat.
Some people are also careless (or ignore what the manual is or follow proper guidelines) and block the fan vents underneath the system which will cause the system to mafunction. Also some people bump their systems or use them in inappropriate environments (using a laptop in the snow anyone?).
Although sometimes stuff happens and a system malfunctions a system will last long and work well as long as you follow proper use guidelines and take care of it properly.