Hello Shicken,to Windows 8 Forums,
Leaving both keyboards connected, go in to "Device Manager" and right click on "Keyboards", select scan hardware changes.
If both keyboards are already listed, right click on the USB keyboard to scan for hardware changes and then "Update Driver Software", reboot and see what happens.
Keep us posted
Don
Hello again Shicken,
Sorry my suggestion did not help, however, have you tried plugging the keyboard in to a different USB port?
My system has 8 ports and keep forgetting that 1 does not work properly and try to use it and wonder why things don't work right.
Don