Hi,
If your PC was running a RAID volume then let's get that information posted.
Try clearing the CMOS and set the bios back to the defaults
It's unconfirmed if the below utility will work on an advanced format hard drive if that it what you are using.
Cyberlink recovery CD for hard drives. When you have created this CD, insert it into the system that is unable to boot, restart it and wait until you see a window with a green check mark. Then remove the CD and insert your first Recovery DVD. Restart the PC and go through the process of installing the Operating System again. Hopefully it should install properly this time.
Now try the HP recovery disks.