It's been a while so I can't remember what I was doing when it stopped working. It is a Redgragon Yaksa keyboard. I've tried almost every USB slot in my mobo, nothing. You might think that the obvious thing would be to download new drivers. Well, when I go to Device manager> Keyboard> Update driver, for every single one, it says they are all up to date. And when I google "Redragon Yaksa drivers", it only comes up for downloads to other Redragon drivers. I have no clue what to do. The lights are on and the keyboard was brand new when it stopped working, so I really don't think it's broken. The reason I am trying to solve this now is because another keyboard of mine, a PSI/2 keyboard, suddenly stopped working after my comp crashed last night, and nothing I do seems to fix that either. I am tired of having my keyboards die on me. Enough of this anarchy and suffering! (I am using an old wireless Logitech to type this.)