I am trying to open some old zip drives (100) to see what is on them and download to my laptop. When I attach the usb cable from the zip drive in to the HP pavilion laptop the green light and the amber light on the zip drive come on and stay lighted. When I highlight the E drive in the my computer window it states "E is not accessible. The request could not be performed because of an I/O error. Any help on how I can get the zip drive working and run the zip disks so I can access whatever is on the disk? I have only minimal computer experience.