Help with mac book pro fan noise

Hi i am having trouble with my mac book pro, the fan noise is too loud. even when i am working on only word documents. Please help

Here we go:
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Hope this helps

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