Why can't I get this laptop to connect to wireless net, but I can get 2 pcs to work just fine?

Computer: ASUS Notebook G73Jh Series

Windows 7 SP1 64bit (OS was in pc when built)

Intel Centrino Advanced-N 6250 AGN (wireless nic)

Router: NETGEAR WNR1000

I am trying to get my brother's laptop to connect to Dad's wireless network at home. Being the only computer guy in the family, I was the one that setup the wireless network here in the first place, so one would think that I would have no trouble getting this to work. First I connected a computer in Dad's office, and it was a bit of a pain learning how the device works. That was over a year ago. Earlier this year, I connected my computer to Dad's network, wirelessly, and I had no problems. Yesterday, I tried to get my bro's computer online- should have taken me no more than 2 hours and I have spent over 4 trying to figure it out.

I do not use the router as a DHCP, so everything is static. I use an Access List. I made sure I have the correct MAC Address and computer name for all devices. The router is auto channel, using WPA-PSK [TKIP] + WPA2-PSK encryption and verified all devices are using the same key. And the router gets it IP automatically from ISP.

I have tried adding and removing DNS client from the laptop.

It will connect to a near by unsecured network, but not the one that is right here (the laptop is literally 1ft away from Dad's router).