So i helped my nephew make his pc for christmas and after we finished we upgraded from unactivated windows 10 to upgraded version with internet. Then after the restart the network stopped working. I've tried everything they suggested on google and youtube so idk what the issue is. My brother in law, who is my nephews father, works for atnt and he connected us to their net before it stopped working so it's not a cable or wiring issue. Troubleshooting tells us this:
"ETHERNET doesn't have a valid IP configuration"
"ETHERNET doesn't have a valid IP configuration"