I connect my computer using LAN. I get Unidentified Network & No Internet Access On Windows 8.0 I also has no IP address. However, I connect my LAN with a computer using XP. I have internet access.
Are you using the same PCs or two different ones? If two different ones are you using the same hardware and cables to hook them up? Also if it is two different PCs, and you are moving the router over to W8 you may need to hard rest the modem/router.