Because customize section was removed from user scenario and i have 12900hk cpu, so i want play with that little bit, but no through bios, because right now im not able change ratio for active core, even if i apply it in bios, options are saved, but in current options are not applied. Im trying find way, how to play with that and support dont want help me, because of risk of damage, so im stucked. I have K version, but im not able play with that. I applied liquid metal and im stable on 100 - 110w tdp on full load. I dont care about warranty. If something will happen, tomorrow ill buy another one. I bought this laptop because of it, that i have playground, but right now im staying in front of this playground and just looking on that.why do you want to revert back to a previous version?