It could point to many things, including aggressive power profiles, background software updates or even dust building up.

Laptops generate heat. You can't really avoid it. Even energy-efficient models are still producing some level of heat. To try and keep things cool, your laptop fans should kick into action when you're doing something that pushes it hard, like gaming. By design, most laptops will ship with adjustable fan speeds that keep temperatures cool without too much noise. You'd usually expect the fans to quiet down, although they won't necessarily stop completely.

That isn't always the case, though. You might hear your laptop fans…

Read the full article at ENGADGET.COM