Windwalker222,
Just follow the instructions I posted above. Windows 7 will install on the computer. You will need to DISABLE "Secure Boot" and maybe ENABLE "Legacy Support" in the "BIOS Secure Boot cofiguration" on the settings page shown below before you can attempt to install Windows 7. Depending on what was left on the hard drive when Best Buy got a hold of it, you may have to try booting the DVD as UEFI or Legacy until you determine which method works,
Windows 8 OEM computers, such as HP, no longer have a Microsoft COA with Windows product key as previous Windows computers did. Microsoft now requires OEMs to encrypt the product key and store it in the BIOS.
Please send KUDOS