A:AnswerThank you for your question! This model was likely use for business purposes and when the company upgraded they sent the models back to HP for refurbishment and resell.
A:AnswerThe warranty period depends on who refurbished the computer. I would reach out to Best Buys customer support to help clarify. https://www.bestbuy.com/site/electronics/customer-service/pcmcat87800050001.c?id=pcmcat87800050001
A:AnswerThank you for reaching out. You could add additional RAM yourself if you wanted but you would have to disassemble the laptop to some extent to add the extra ram.