New Laptop Having Issues Receiving Wireless IP Address from Router

So my friend just came over to my house today to use his fancy totally brand new MSI GE60 that he got from Newegg. This was the first time he was using his brand new laptop with a wireless network, and I need to specify that nobody else who has ever visited my house before has had problems with my Wireless network, including this very same friend, back when he was using his old laptop.

So we tried re-entering the caps-sensitive 15-character-long password several times and we still managed to get the same problems--the computer constantly switches every 2-3 seconds between being disconnected, having limited access, and being connected to the router but still being unable to access the internet.

His installation of Windows came with a program made by Intel, the guys who make his wireless card, that allowed him to run diagnostics, and it claimed that his ipv6 was not receiving an IP address from my router. We've tried disabling and re-enabling his wireless adapter several times and we've tried restarting my house's router twice...everyone else in my house can connect totally fine, but he is still having these strange issues.

So I downloaded Connectify and set up a network on my laptop and had him connect to it--and it worked just fine.

Everything is set to DHCP and we even went through each and every single settings panel of all of MY laptop's wireless stuff and just copied it down onto his computer--it's just not working. We tried rolling back the drivers and disabling all of his firewalls/security applications, and it didn't work.

I have A Verizon FIOS Actiontec Wireless Router and he is using an Intel Centrino Wireless-N 135 wireless adapter inside of an MSI GE60 laptop.

We're unsure as to what else we can do to solve this issue. Connectify seems to be working fine but I don't want it to be a permanent solution, I'd like for this to be fixed so that I don't have to share my wireless connection.

Does anyone know how to solve this problem?