It would be helpful if you provided information about your hardware - at least Mobo, CPU, and specifics on any USB hubs. What Aquacomputer devices do you have? What are the USB cables plugged into? Are the Aquacomputer devices powered properly (SATA or Molex depending on the product)? In your 2nd post you said pumps (plural) - do you have more than one pump in the system? Can you post a screen shot of the USB devices in Device Manager?