Thanks for your help and the time you spent on this, please send the file when modification will be done. I will do the flashing with SPI programmer later. Have a nice day. PS : Do you know if the bios is protected with a digital certificate on OEM laptop with W10 preinstalled ? It seems you can't upgrade from home to pro for this reason.
To make modified bios I must first get from you a bios dump with SPI Flash programmer, otherwise you will lost all personal info - SN, MAC, UUID, etc.