Michael! Thank you question. I am a licensed printer professional with over ten years of experience, and I will be assisting you today.I'm sorry about the issue. What's the model of your windows 8.1 computer? Is it laptop or desktop?What are the devices that are currently connected to those 3 USB ports?Is there any other USB port in front and/or at any other side of the computer?Is this the first time you are trying to connect this printer to this computer?
Do you have the printer software CD disk?Please reply at the box below. Thank you,