Hi, here how it goes:
I had mouse and keyboard connected to two highest placed ports on back of my mobo. Randomly when I'm starting windows both ports are not working, mouse and keyboard are off. Can U tell me what is the problem ? I've had before asus motherboard as well and I was experiencing the same problem. Ended up seling mobo. I have nothing else connected to any of USB ports. Aha and the other thing, sometimes when I switch on computer, after a while it goes of and goes back on itself continuing starting OS. Is that normal ?