Why does my MacBook Air produce so much noise

My MacBook Air's fan is spinning rapidly even though there are hardly any programs running. This normally only occurs when I am using the MacBook at a high intensity. However, the fan stops only when the MacBook shuts down. However, when I turn it back on again, it starts spinning at maximum speed again. Why is this so and how can I solve this problem? I need to use my MacBook urgently without it producing any noise from the fans.

Update:
I have included some screenshots from Activity Monitor. However, I am not sure which of them are applicable at this point in time. Sorry.

Solution 1:

OK, the Activity monitor does no show anything unusual.

You are a candidate for the SMC reset. SMC (system management controller) is responsible for fan control, the battery charging ect..

Follow the instructions here for how to.

Apple kb HT3964