So a few days ago I came home from work and my internet wasn't working. I connected to the wifi on 5 different devices, but none of themy can actually use the Internet. When I connect my Xbox to the internet, it says "DNS isn't resolving Xbox server names." When I plug an ethernet cord into my PC and Xbox, it shows I am connected but doesn't work either. On my PC it says I am on an unidentified network. I click on that and it says my internet is limited. I then click the diagnose button and it says ""Ethernet" doesn't have a valid IP configuration." My step dad's computer though is working. He is connected and it allows him on the Internet. We are usingoing the same connection. I tried restarting everything and I also restarted the modem.