I downloaded the ISO.
Double clicked the ISO (which then mounts the ISO).
Then followed the instructions to install.
After install I noted that the display was very slow when swiping on the Start screen. Went to Windows Updates and low and behold there was an updated graphics driver. Installed that update as well as all the latest 8.1 updates and viola.
All working except for the camera. It appears that the OS does not recognise the camera drivers. Was hoping HP could tell me if there is an updated driver for the camera.