I've been doing this for 30+ years professionally. If she's comfortable with Windows then stick with it. I tell people that ask me to go up to the store and find one that's comfortable for them. By that I mean, does the keyboard fit your hands, do you want a full numeric keypad, make sure the screen is the size that work for their eyes, pick it up and figure out if the weight is good, etc. Have her do that then, as her employer, find the one that best fits HER needs. You're not buying 800 laptops, just one.Then go configure the best make and model that fits those requirements. It sounds cheesy but an employee happy with the tool that they're going to spend most of their time on is a productive employee.