System won't boot after downgrading uefi

ZuooMan

Commendable
Aug 22, 2016
2
0
1,510
Hello!
This is my first post here as well as first post in english anywhere so I will try to make it clear for everyone. My motherboard is Asrock b85 pro4 and at the beggining I mean before I upgraded my uefi to the newest version everything was fine up until I decided to overclock my CPU. When I entered uefi I noticed that there's no more overclocking option. My job was simple from now on, donwgrade uefi to 2.20 where overclocking was still possible. But here comes my first and last problem. System won't boot. Computer restarts over and over at the time where system is loading.
Last hope was to upgrade uefi to the newest version where system works correctly. I tried to install "fresh" windows on my SSD but it didn't help. Same issue. Any advices?

Thank you in advance! :)