I read all your replies. I am having the same problem with my connection since I installed Windows 7 (previously XP) All the other 3 computers on my network still work. In device manager there is a yellow ! next to my wireless card. I have purchased a NIC/USB and hope that will work, otherwise I don't see any other solutions except buying a new NIC card which is no longer available locally and will have to order one online. Suggestions?