So, I have program that worked on a previous Arduino DUE.
I downloaded version 1.6.6 of the new software. I downloaded the DUE application for the development environment.
After installation, I went to "Tools-> Board -> Board Manager and I selected "Arduino Sam Boards (32-bits ARM Cortex- M3"
I installed the software.
I then went to Tools-> Board and selected "Arduino Due (Programming Port)".
I rebooted my system.
I then connected the Aduino DUE to my USB port using a "Rocketfish" mini-usb cable. (the board did not come with a programming cable).
The power LED came on and the "L" LED flashed about once a second. The TX and RX LED's did not come on.
I waited a bit to see if the USB driver would load. It did not. I switched to a known good USB port on my computer. It still did not load.
I looked at my "Device manager" and found no Arduino drivers on any of my serial ports or any in the USB Serial Bus controllers menu.
I have a Window 7 64 bit operating system.
My computer is an HP Elitebook 8570.