How's it going.Let me read of your question. Give me a minute.
Did you upgrade to windows 10 for free? If you did it gives you a digital reservation for you to due it again. Your information is stored in the BIOS.
Would you like office 365 on your windows 7 pc or would you like windows 10? Either or should be fine and I can help you pull the licence and upgrade again to windows 10.