Ethernet Connection Problems

Every time I try and connect to the internet via Ethernet, It will for some reason not work. I can connect wireless totally fine, but my Ethernet I cannot, as stated earlier. There's an error message when I trouble shoot it that says "Ethernet doesn't have a valid IP Configuration." I tried flushing the dns server, flushing my ip server, and reset winsock etc... Nothing has worked. My modem router, it's what I have, its a netgear nighthawk, is brand new and works perfectly; but I have feel like there's a problem with the internet in my house.