Possbile solutions:

-Disable the Ethernet network adapter if you are not using it. This applies, for example, when running a WiFi home network with computers that have built-in Ethernet adapters. If you want to disable the adapter, double-click the small Network Cable Unplugged error window and choose the Disable option.

- Check both ends of the Ethernet cable to the adapter to be sure they are not loose.

- Replace the Ethernet cable.

- Update the network adapter driver software from the manufacturer's web site.

- Change the Link Speed and Duplex settings (using Device Manager) to use '100 Mbps Full Duplex' or '10 Mbps Full Duplex' instead of Auto Detect.

- Replace the Ethernet network adapter if it is a removable PCI or PCMCIA card.

The device your Ethernet adapter is connected to, such as a modem or router may not be working properly.