....... I have a driver driver for my
serial to usb cable. I Googled around & will found them on the net too, just to prove their existence.
http://www.usbgear.com/USB-Serial-Adapter-Drivers/... If you go to radio shack or computer store they will know what you are looking for...
I was given an older one once which I thought would make a good second cable for me but I was unable to find the driver for that old cable which was compatible with my current operating system.
The stuff happens.
The link above may have what you are looking for?