|The fan speed increases with the internal temperatures. If you are using/running something different that might be normal, but if you are not then you probably have a build up of dust in the notebook. Use a can of compressed air to blow out all of the vents and remove the dust so the cooling system is not overworking and you should not hear the increase in the fan as often or at all. Remember to only use a laptop or notebook in solid surfaces to allow best air flow.|
You have to be a little bit crazy to keep you from going insane.