MSI 970a-g45 BIOS downgrade... need help

[Darcar]

Hello mates !
i need downgrade my mobo from bios ver 2.8 to 1.11 i want back to win 7 from 8
MSi says its impossible can anyone extract the clear bios bin and write directly to winbond 25q64bvsig chip
its possible ?
Thanks in advance for reply !

[toyota123]

install from usb without formatting the 8 version then delete all win 8 files manually...