I upgraded my mother board to a Z390 A Pro, my CPU to an I5 9600K, and my ram to Corsair 16 GB (8x2) 3000mhz yesterday. My mouse and keyboard works in bios but not windows. I am assuming I just need to install the motherboard drivers, but I can't really do that when I can't even sign onto windows. All of the USB options are enabled in bios (USB Controller, XHCI Hand-Off, and Legacy USB support). I tried disabling XHCI Hanx-Off and that lit up my LED on my keyboard and mouse, but windows still wouldn't receive input. Thanks for any help!