Latitude E5430 looses WiFi connection

Hi,

I have just received a new Latitude E5430 with Windows 7 64bit.

It  worked fine for a day, and I was just getting to the phase were I'd be installing  all the different the software , when after doing a windows update the wifi connection was lost.

Whatever I did, it would not work again, it was trying to use the 169.254.xxxx.xxxx IP address instead of 192.168.xxx.xxx..

Deleted all network settings, rebooted the router/modem and finally I got back to a proper IP address but the system is still not connecting.. claiming the signal is poor, even from 2 feet away from the Router.

Deleted MacAfee but to no avail.

Is this just a faulty network card? Any other suggestions?

Thanks a lot

Jeroen