Downgrade bios f18 hp bk004la for f10

Is it possible to downgrade bios f18 to f10 from hp bk004la?
When I run bios f10, the update option is disabled.
Can you solve this?

It’s possible, but a pain in the rear to sort out. Why do you want to go back? It’s easier to do if you order a flash programmer (CH341A) + SOIC8 test clip with cable

I tried in many ways to update bios insyde h2o but it is impossible.
Is there any way to update bios by editing plataform.ini file in the bios program?