[Cerberus]

What OS are you running?

Try dropping into device manager and see if there are any red crosses or yellow exclamations there under the sub section, Network Adapters.

The network card is either incorrectly installed or disabled.

A yellow exclamation mark or red cross signifies that the card is incorrectly installed; you should follow the manufacturers’ instructions to reinstall the
card.

A red cross indicates that the card is disabled. To enable it, click the right mouse button on its entry in the device manager and select “Enable” from the box that appears.