I've always been able to find a computer in the lab, but I would definitely recommend bringing your own. I used my computer a million times a day for all kinds of things, and I would have hated to have spent that much time in the lab. You'll especially want to bring a computer if you're living in a dorm that's not especially close to the lab, like Brecon, Radnor, Haffner, Rhoads, or Rock.