You might get some more information in the Networking Forum. Wow.. This is a little strange. I never heard of this happening. Open CMD and type in "ipconfig/ all" To make sure all the settings are the same on other computers. For the computer that is using the wireless adapter, Are you using the D-Links software? or Windows to manage the Wireless configuration? If it was me, I think I would start all over and do one computer at time. Make sure all the computers can connect without the WEP, if it can, thats a good sign. Then try the wireless WEP, Make sure your SSID and WEP key is correct, If it doesnt work, then check the settings on the Netgear router. Its hard for me to solve problems over the internet..