HP Photosmart Express software is not installed
You pressed the Photosmart Express button on the printer but the HP Photosmart
Express software is not installed on the computer.
The HP Photosmart Express software must be installed on the computer before you can
use the Photosmart Express button. Insert the HP software CD that came with your
printer in the CD drive. Follow the onscreen instructions to install the HP Photosmart
Express software.