You are working on your laptop and suddenly an error message pops up, “system temperature critical” and the system shuts down. Quite puzzling, it seems. Everything was working as expected, then suddenly the error message and then shut down.What has gone wrong? Such type of error message usually indicates that something is wrong with the cooling system of your Hp laptop, mainly the fan. The one and only purpose of the hp laptop cooling fan error is to vent out heat, and when it fails to do so, you get the cooling fan Error.