I have an Hp 15 laptop that the hard drive quit so I replace the hard drive and now I am attempting to install the OS. The problem is that I do not know what OS was originally installed. I know it had to be either windows 8 pro or 8.1. I have 8.0 pro, 8.1, 8.1N, and 8.1. Since the product key is embedded in the BIOS, It seems that one of those OS's would pick up the respective license key, but I have tried every one of them and neither one will pick it up. How can I know what OS is the correct one that will pick up the License Key?