Hello Daniel and smi5ths,
Daniel, I saw your post about the message "Device Installation Not Complete" showing on your Windows 7 computer.
I have researched this type of installation issue for you and have found a troubleshooting guide that I recommend you follow.
I will post the steps below. I hope this helps!
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02266743
smi5ths, if your error message is the same, please follow the same document.
Good luck!:)