Downgrading your computer’s BIOS can break features that are included with later BIOS versions. Intel recommends you only downgrade the BIOS to a previous version for one of these reasons: You recently updated the BIOS and now have problems with the board (system won’t boot, features no longer work, etc.).

How do I downgrade my BIOS to previous version?

If you are a Laptop user check the make and model of your laptop -> go to the make website -> In drivers select BIOS -> And download earlier version of BIOS -> Plug in or connect power power cable to the laptop -> Run BIOS file or .exe and install it -> After completion of it restart your laptop.

Is downgrading BIOS safe?

Downgrading a bios is about as safe as upgrading in that you cannot be interrupted or disaster will strike, but it is in essense no better or worse and is done all the time. I never suggest upgrading a bios unless you have specific issues that the bios update corrects.