http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01867124&cc=us&dlc=en&lc=en
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03481733&cc=us&dlc=en&lc=en
Create the recovery media. Store it in a safe place and use the 10% for what ever you chose. I would use a flash drive to create the media. more reliable than DVD's. I have both and also a back up image of my OS on a external drive.
Dokie!!
PS I think HP only gives you one chance to create the back to factory media. The 10% you save might not be worth it??