When Windows completes the reboot and reinstalls the LAN drivers, it should recognize the LAN port and you should then see the Network and Sharing Center pop up. When it does that, its waiting for you to decide if the LAN is on a Home Network, Work Network, or Public Network. If that secondary "Set Network Locations" popup does not appear, click on the Link to the network that is to the right of the bench picture or image on the left hand side of the popup. That will bring up that popup window. Select the network type that you usually use. I use public network and have everything firewalled within my own network. If you don't see that first larger Network and Sharing Center pop up, you can force it by right clicking on the network symbol on the right land lower corner of the screen and select "Network and Sharing Center". At that point you can select the network link and reselect what it currently is set for or change the network type. Rereading through your posts, it hit me that windows may not automatically recognize what it believes is a new network. The key point was your statment regarding "Unidentified Network, and Limited". That basically means that Windows has encountered a new network name and won't let you on until you identlfy what type of network it is, as that sets policy rules for the firewall. Essentially it's for your own safety. Whenever you reset the CGN3 back to factory defaults for example, that will cause Windows to think it has encountered a new network when the CGN3 and PC connect and you will be out of luck until you declare what type of network it is. Having said all of that, this is what I normally see on a Windows 7 PC as this is where I usually experiment. I would expect the same behaviour with my Windows 8 pc or laptop.
Give this a try as soon as you can to see if it clears up the connection issue.