Haven't had much time to play this past year; busy with real life things. However I am off till Jan 2 so you may see me around playing Ghost Recon Wild lands 4v4; if you see me come say hi.
I see on board NIC's fail on older boards on a regular and radios in wireless connections go out as well. Adding an inexpensive Intel based PCIe ethernet card is probably your best bet. Have you checked your modem status? Make, model?