@blackiam
Problem is that the HP product page for your PC shows it coming preinstalled with Windows 8, not Windows 7.
HP only warranties their products for the original OS that comes preinstalled on the PCs -- and they only make drivers for those OS versions, as well.
So basically, since you are replacing the original OS with a different one, you are on your own for support and will have problems with this move because there are no HP drivers for your PC.
I am a volunteer and I do not work for, nor represent, HP