Jeremy.
Forgot to mention earlier, while setting up the new laptop and testing cameras etc make sure that you don’t place loops or coils of excess USB cable and power cables close to the laptop.
Camera should be as far away as it would be when attached to the telescope and the USB cable should be laid out straight, same applies to the camera power cable. Avoid running USB cables parallel to the laptop chassis, cables should always be run outwards from the laptop where possible to avoid induced interference.
William.