This is a brand new problem, as I've had no issues so far with this router.
All firmwares are up to date.
Just today, I tried to connect via wireless and it says it cannot connect to the network. I have the Network Diagnostics window appear and it says "Windows cannot connect to "***" (where *** is my ssid); The wireless network security key is not correct."
This is impossible, as I haven't changed it at all. I checked within the router settings, network key is the same.
This is on Vista Home Premium.