How do I wipe my hard drive
How do I erase the hard drive on my HP Pavilion 17 PC Notebook so I can sell it?
What I would do is remove the Hard Drive, put it in an enclosure and attach it to a computer. I would then erase the Hard Drive on that computer and put the Hard Drive back into your laptop and re-install the primary OS (e.g. Windows) using bootable USB.
Unfortunately I could not find a guide for removing the Hard drive for your computer. Maybe someone else can help find one?