Hi:
With Recovery Disk 1 in the DVD drive, try this:
Restart the notebook and at the beginning of the HP wlecome screen, tap the F9 key to access the one time boot menu.
Select the DVD drive from the list of devices and hit the enter key.
Watch the screen for a message that states" Attempting to boot from DVD...press any key to boot from DVD..."
Presss any key and the PC should boot from Recovery Disk 1.
Then follow the rest of the on screen instructions.
Make sure you have backed up any files you don't want to lose before using the recovery disks.