Yes I wondered about that too , it was caused by a usb card reader that was connected when windows was installed and windows assigned c:, d:, e: etc to the usb drives . I had to disconnect the usb card reader and since this was a new computer I reformatted the hdd and installed windows. The videobox software then installed flawlessly as the boot drive was now c: . Thankyou for helping Steve. We can now get on with the project.