I upgraded my pc (new cpu, motherboard and case) and it finally works. I attached my keyboard and mouse and they work fine in the bios. But as soon as I get to the windows login screen, they are turned off. Usb and legacy usb are enabled in the bios. I tried different usb ports (usb 2.0 and 3.0). I can't get into safe mode because I also need to login there and I'm unable to do that. What can I do?