I've never liked relying on a recovery partition so under Windows 7 I'd make recovery disks then, when the hard drive failed, I'd install a new (blank) hard drive, boot from the recovery disks, and restore the PC to 'factory condition'.
It appears that Windows 10's recovery drive can't do that even if you check 'back up system files to recovery drive'. (It makes sense if you read it carefully. 'system files' isn't the same thing as 'system image'.)
Is there something in Windows 10 that can do what I'm trying to do or is this something else Microsoft removed?