Laptop overheats very frequently, the cause of this?

Question

I have an Acer Aspire 5715z and removed vista on it and now I have XP but since i've gone to XP the fan doesn't seem to do its job properly, it doesn't turn on when it gets hot, even when you can feel the heat through the laptop. Its only after the laptop restarts in which the fan begins

Answer 1

Laptop fans are controlled by the laptop BIOS, not windows drivers. Therefore I suggest you contact Acer technical support

Answer 2

During the removal of vista, the drivers needed that control the fan were probably removed. At a set temperature in the temperature sensors on the hardware, the fans would start spinning rapidly, but because you down-graded I guess those drivers died.

It'll be extremely hard finding out what fan you have, seeing as most laptops don't display their cooling systems.