Hi, I would say about 4 months ago I hooked up my brother's Adelphia High Speed Internet. I had to install an ethernet card onto the computer. I did this with no problem. He had no problem's with getting onto the net until one day I guess something happened while some program on the computer was updating. The computer shutdown. Well now they can't get back onto the net. The computer starts and there is no problem I see with the computer. I scanned his computer with Trojan Remover. There were no malicious files found. The cable modem which is a Mortorola Surfboard SB5100 shows no sign of internet activity at all. The PC/Activity light is not on at all. It usually flashed before. I thought maybe its the Etherent card. I even reinstalled the ethernet card. I don't believe it is that. I'm not sure what it might be. Any suggestion's?