I just built a new PC, and have a ASRock B450M HDV motherboard. I do not have a wireless network adapter, but from what I've read I should still be able to use ethernet. However, my ethernet does not show up in networking and neither does my mac address. I've tried installing the drivers, reinstalling windows etc and nothing works. I get the error "The Realtek Network Controller was not found" when trying to install drivers. What does this mean and how do I fix it? Do I have to have a separate wifi card for it to work? Or is my motherboard faulty, meaning I would need to get another?