Since you say it never happens from your hard wired computers, I am assuming your Surface Pro 2 is wireless. (which it generally would be).
This has been an issue for years and years. If you search it, go back at least seven years. I wouldn't even call is an issue. Wireless computers are going to lose connection from time to time. That is just a given with wireless. You can use more WAPs or have wired connections in the room.
Back in the day, this issue came up ALL THE TIME. The answer was always go wired on everything.
