There are many threads and articles regarding this issue. I found a simple fix that worked for me instantly. I simply used a different cable. The cable supplied by razer seems to fail quickly and there is not way to tell that this is the issue. If your Razer Wolverine Ultimate or Chroma V2 suddenly stops being recognized, simply try a different cable. I tried every single fix I could find on the web and nothing worked, then I just tried a new cable and it was recognized immediately. Hope this helps