Acer A315-41: Is it possible to downgrade an Insyde bios?

[Gatesuka]

Hi all

I have this Acer A315-41 laptop: it worked fine until I decided to update the bios... -_-

Now the CPU fan is ALWAYS on (or at least is on for the most part of the time I use the laptop, even is I am just browsing the web or listening to some mp3), and the CPU temperature is like 80/90 C° even is I am just watching some video... -_-

My bios version is 1.13.

https://www.acer.com/ac/it/IT/content/su...t/7540?b=1

This is the Acer webpage of my laptop.

I've tried to reinstall a clean W10, checked every possible virus, malware an so on, but everything is just fine: this weird behaviour started the very moment after I updated the bios.

I've checked also any software which starts with windows, but I have nothing set on automatic start.

Is there any way I could rollback to the previous bios?

Thank you for your help