KC_Tan

I'm trying to connect my windows 7 pc to the internet using the ethernet cable, plugged into a TP-Link WPA271 extender. The PC is currently connected to the internet wirelessly. The TP Link extender is working - both wirelessly and through the ethernet - I've connected to both using my laptop. When I plug the ethernet cable into my desktop, it detects the LAN in the network and sharing centre, and lists it as unknown network but with no internet connection. I've tried everything I know how to do - checked that the PCI card is working, disabled it and enabled it, turned the router on and off. Can anyone help?