Yesterday my daskeyboard was working perfectly fine. Today, I turn on my computer, and find it won't open the lock menu on windows, though my mouse, when connected to the computer and not the keyboard, works fine. So, I restart my computer, and it still does not work. I turn on the PSU and then turn it on, and then turn my computer, still nothing. Finally I unplug my keyboard and plug into a Mac, I do not have another PC to test in case daskeyboard works with only PCs, and it still does not function. Any ideas on how to fix my keyboard?