Can't connect to internet on laptop but all other devices do

Laptop: HP G60 Notebook PC (About 4 years old I think)
Modem: Motorola SB5100
Router: Cisco Lynskys E2500

My problem is that I can't get my uncles laptop to connect to the internet. I'll start from the beginning.

I'm at my grandmas house and she wants me to get her IPad connected to the internet. At this point my uncles laptop does connect to the internet. She does not know her password, so I pull the network security key from my uncles laptop in the wireless properties. So then I used that and was able to get my grandmas IPad, my S4 and my Lenovo, which I'm writing this on connected.

After, I find that even though these devices are connecting, my uncles laptop suddenly won't connect to the internet anymore. I tried restarting the computer, restarting the modem and router, unplugging the modem and router, restarting again, followed whatever trouble shooting options Windows 7 provides. I also tried getting onto the guest wifi which asks for the network security key and the network security key that I just used previously won't get me on the guest access. So I tried to double check the network security key through wireless network connection status again, but for some reason the wireless properties option is no longer available.

The only thing that I think could have happened is that a driver updated somehow and maybe needs to be deleted, but I have no idea how to figure out which one it might be, if that were the issue.

HELP! Be nice please