I've inserted the System Recovery disc 1 that came with the computer. No change.
Usually that means that that device is not higher than the hard drive in the boot device order. You would probably need to get into your BIOS screen to change that. See your User Guide or contact HP for more information. Post your product id (e.g. what details you need to use HP's site to find your particular documentation and downloads but not your serial number) if you need someone to help interpret your user documentation. In W7 HP had a nice tool that gave me those details. I never found anything analogous from W8, except in bits and pieces.
HTH
Robert Aldwinckle