Summary: This product was easy to install and worked perfectly. I am really glad to have physical media so that I can reinstall my operating systems if the need arises. The Windows tablet that I bought this for was refurbished so I didn't have a factory image partition to use.
Summary: Sorry but I don't remember getting an upgrade version of windows 8.1 but perhaps I did. I purchased three each from different vendors as I looked for best price but not all from eBay. I've upgraded one laptop with additional memory as well as a new larger capacity hard drive and added win 8.1. Another newly purchased laptop I also added additional memory and a higher capacity HD and win 8.1 as it was a Linux machine.