Updatating BIOS ??

Fraxure13

Honorable
Oct 24, 2013
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I will buy this motherboard : MSI H77MA-G43

but this motherboard does not support windows 8 until BIOS update, so the question is how can I update the BIOS without the HDD ? Cause I have windows 8 right now. i have an older mobo and i updated the BIOS.

will the motherboard work, even though win 8 is not supported ? do I need to downgrade to windows 7 and update bios then upgrade to windows 8 again ? any help ?