When teaching live courses, I always check out the room, equipment, and room temperature before the first class meeting. I make sure that I arrive in the class early the first meeting to make sure things are fine too. The biggest frustration that I have witnessed in computer courses is when equipment needs to be repaired and there are not enough computers if there is a computer out of order. I encourage the students to bring their own laptops to class. This not only helps with breakdowns, but it lets them continue working on their own computer between home, work, and class.