Many thanks, laurence. I recently bought a bios programmer. I looking for bios already flashed on the internet but is more complicated for me buy that. Also i don't lose so much, if not works, will buy programmed bios.You can buy chips already flashed, not that I am suggesting you should do that or anything. You might be able to get it back as other people have done the same thing as you and live update the bios. Search the forum for posts; also you could raise a support ticket with msi and ask for advice/help.
I asked MSI, but they said as option CMOS remove battery only.