|Have you looked in Device Manager to see if there are any errors showing with Ethernet? |
While you're in Device Manager, expand out "Network adapters" then right click your Ethernet entry and select "Uninstall". If it asks whether you want to remove "Software" decline, otherwise ignore any other warnings. Restart the computer.
Note that the above is not an Uninstall in the usual sense of the word. What it does is detach the software from the hardware. When you restart it will "find new hardware" and install the software again. This has been known to fix problems.
I would hold off on motherboard replacement for a bit as we have only just started going down this path. I think much of the previous stuff has been asides.
Always pop back and let us know the outcome - thanks
message edited by Derek