It seems you have tried everything on the software/driver side, maybe the wireless card is just bad. If you have or know someone that has a wireless USB dongle you could try that it will at least show that you can connect wireless with the PC.
I'm not sure if this problem is resolved already. But when you see an "X" next to the Wireless Network Connection icon. That means it is disabled. You have to right-click on it and choose "Enable". Then disable the other one that say "Local Area Connection".It doesn't appear to be disabled and it is not greyed out just has red "X" next too it. Went to the properties and it doesn't show anything for IP address it has the option selected for "obtain ip address automatically.