If she's not very tech savvy, you might be best served to wait. Many law schools have programs where you can buy a laptop from the school itself (it gets added to your student bill/loan) and then they guarantee it for the 3 years of school. They will support it, fix it, etc on site - and since she'll likely want to use it for law school exams, they'll guarantee that it will work with the exam/lockout software.
I brought my own laptop, but many people were best served with the school's option. (I went to law school, hence I've seen this.)