This is the same problem I had in installing Win 7 on a new HP h8-1435. Check on HP for drivers for the HD interface. I had to go to the motherboard manufacturer to get them. Once I got them, I put them on a USB stick. When it asked for the drivers I put in a USB stick pointed to the driver and all was well.
If you do a Google you'll see this problem around. So, we're not the only ones.
EDIT: what model number do you have??