I have had this PC for four years it is a Compac it has Win ME on it.I have 128 MB ram and he has been loyal. problem is i turned it on yesterday and got a black screen with the message "there is key board error".Well i thought my keys were stuck so i disconneted the keyboard restarted and got the same message.I then removed both the keyboard and mouse , powed it off and back on and still the same message .What could be problem?