Screeching noise?

I installed a firmware update on my mbp and when it was shutting down it made a screeching noise. It said it would restart on its own and it did but it took a couple minutes. Everything works fine. What's up with that screeching noise?

Hey @Mommymonster2 ,
Welcome to the HP Forums!
I understand you're experiencing a loud screeching noise on your new notebook.
Can you please tell me which notebook you have and the installed operating system? For information on finding your product and model numbers click here: How Do I Find My Model Number or Product Number? To see which version of Windows you are using click here: Which Windows operating system am I running?
Can you tell me if the screeching is coming from the speakers (only happens when playing audio) or from inside the notebook? It's possible the screeching and skipping is the result of a read error or spike in the hard drive disc usage. From what I've read this sound to be the most likely source of the issue assuming the sound is not coming from the speakers. 
Let me know the source of the sound and I should be able to help you fix this.
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

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