I have a desktop PC using Windows 7 Pro. and a Airlink N 150 Mini USB wireless adapter. My 2Wire modem/router from AT&T was failing to stay connected and was replaced today with a Netgear 7550 modem/router from AT&T. I installed the Netgear 7550 and am able to access the internet with my Asus Laptop, my LG Thrill phone, and my Samsung Galaxy 2 tablet with no problems. However, my Desktop cannot connect to the internet and the Window Network diagnostics returned the following message: Network Connection doesn't have a valid IP configuration. How do I go about connecting my desktop to the Netgear modem/router so that I have access to the internet? By the way I am able to connect to the internet using an ethernet cable and a LAN connection.