Yesterday I was helping a client to downgrade from windows 8 to windows 7 I partitioned the hard drive and wiped it clean and wiped the recovery drive as well now after doing so I put the hard drive back in the machine I put in the windows 7 disk and it loaded the windows 8 screen then when to the boot screen stating windows setup or windows 8 I press windows setup and get a error code stating I need to place a windows 8 reinstall disk to repair the damage now down grading from windows 8 is new to me can someone please tell me there is a way to downgrade because I know there is a way and I messed up somewhere. Computer Model: HP Pavillion P6-2316s