Originally Posted by strollin
You could try updating the driver or even uninstall/reinstall the driver you have. When you view the ethernet device in Device Manager does it show a yellow ! indicating there is a problem?
It is possible that the ethernet port built-in to your motherboard failed. PCI NICs or USB NICs are pretty inexpensive and easily installed.
I had a look for it in the Device Manager but can see it listed, what column would it be under?
Also when starting up the computer it comes up with "Realtek PCI-E Gigabit Ethernet Boot Agent" I've had a look around the bit it tells you to configure but can't figure it out