To start off, This experience with Microsoft has been a nightmare, bar none the worst customer service ever. The question I have is how do I tell if they are sending me a refurb, or a brand new model. My unit was over heating, running slow, and the fan was going crazy. Happened after middle of December. Anyway, the first Surface person I chatted with told me this was a known problem and that I would be getting a brand new model. Then I don't hear from anyone for a few days, and when I chat again, they tell me I could get a refurbished model. The original guy promised I would get a Brand new in the box! I just bought it in October, from the Microsoft online store. Sorry to get off track. Can anyone tell me the ways to tell If I have received a refurbished model? Serial #, etc. Thanks, very frustrated, and starting to really regret my purchase.