The Wireless Network Security Key Is Not Correct

I've recently started having some odd issues with one of my computers connecting to the internet on my linksys wireless-n router from my pc. When I enter in the security settings correctly for the network I have setup here at home, it says "The wireless network security key is not correct."But I know it is, and I have confirmed on my laptop (which is using the correct settings and is having no issues at all, it's what I'm posting this with) the settings are correct. It has the correct 'Security type (wpa2-personal)', encryption type (aes), and network security key. I have restarted the pc computer and reset the router from factory settings many times, all to no avail. I've used several different linksys wireless adapters and usb slots, and it keeps on with the same issue. Kind of odd thing is, when I change the security type on my computer settings to wpa personal from wpa2 personal, and encryption type to tkip from aes, and enter the passcode correctly, it will connect to the network but with no internet access, local only. I've also connected to the wireless routers setup page (192.168.1.1.) from the laptop and confirmed settings. When I am able to connect from the pc when I change the settings and it gives me local access, I am still unable to the routers setup (192.168.1.1), so I dont know if I'm actually even connected locally when it says I am.Also, the signal strength from the network is Excellent (full bars).When I ipconfig /all ,media state is disconnected When I ping 192.168.1.1 , destination host unreachable, but received all packets with 0% loss.