When diagnosing connectivity problems it’s always best to use the browser Windows likes best.
Go to start, run, type cmd.exe and click ok. Now type ipconfig /all and you’ll get a list of all your internet adapters and their current settings. Find the wired port that you are trying to use and post the ip address, subnet mask, and the default gateway that it lists.
Also, if you are connecting to the dsl/cable modem you MUST reboot it (unplug/plug back in) every time you switch it between a router and PC. If you are connecting your PC to a router then nothing else is required.