ASUS - ZenTalk

I can't Update my bios on my motherboard I've tried separate ways to update but just can't seem to get it right I've tried getting the bios update on ASUS, but it doesn't give me the option of windows 10 OS only up until windows 8.1. Which one should...

I've tried Multiple times to input my serial number and keeps on saying serial number incorrect Motherboard is M4A79T Deluxe