The card I tried to install drivers for is a Realtek 8169 I believe. I solved this problem today by taking the card out of our present computer and installing it in an older machine we have. It worked fine including drivers. What I think may be happening is that the machine we are using has a MSI K7N2 mobo with an intergrated rj-45 which I take it is for ethernet use. I went to MSI, downloaded drivers, installed them and checked the device manager for drivers and it shows the nvidia networking with no question marks or exclamation marks by it. Then tried connecting it to my motorola surfboard and shut the machine down. When I restarted the machine still no internet activity.. The network connections do not recognize the nvidia networking connection, though. When I try to troubleshoot it, windows says there is no driver. I am really confused. I appreciate any help out there.