So, I have 3 keyboards. One of the keyboards does not work on my desktop but it does work on my sister in law's laptop perfectly fine (all 3 do). The other two keyboards work. One is a wireless keyboard, another is a basic wired keyboard and the one that doesn't work is my Razer Blackwidow Ultimate gaming keyboard. I'm not sure what to do. I have restarted my pc but other than that, I'm at a loss.