ok while your working on this be sure to turn your wireless off since you can connect that way.
Try these steps
1. Check the NIC make sure everything is cool in device manager
2. Route back which is place both ethernet cables into the router if one end lights up and not the other try the rest of the ports try this on both ends incase of bad ports.
3. Try resetting the router. Yes I know this can be bothersome at times but its known to work 😉
Also try the above in safemode with networking just to be on the safe side. If it works there then try normal boot and see if it works. If not we might be looking and Firewall, Virus, Spyware, Malware etc...
My personal experience with unable to Receive packets has been the cable but then again its also been the router so definately check both.