It could be that your PCI NIC went out. The NIC is commonly known to go out. One thing to try is go into BIOS and make sure the on-board NIC is enabled and see if Windows detects a card. One last thing to check is in device manager and look for the a heading called Other Devices. If there is one you may need to re-install the ME drivers for your NIC, either off you CD or from the manufactures web site. Hope this helps.