What is the perfect ultrabook/notebook for a student?

Hello I'm currently a highschool student and I owned an old ASUS A43SJ. It is heavy and its starts to freezes ALOT OF TIMES. Thats why I think I should buy a new laptop. My criteria for a new laptop is basically need to be lightweight (doesn't have to be an ultrabook), 13.3-14 inch, doesn't have to be very good at performances (i just need it to be good at watching movies, typing docs, and easy movie/photo editing), and the most important is under 700$ (600$ and below if possible) cause basically i use my own money so I'm really tight on budget. So if you know any laptop that meets the criteria please answer i'm really desperate right now!

P.S. My first option would be Lenovo U310/U410 but sadly that thing is not in production anymore

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