blender

Ok, I downloaded blender portable last night and it works on my computer. I took it to school to show my teacher what it is (since you can't download anything at school) and I was letting him do whatever with it and suddenly everything disappeared. He was doing something and everything went gray. You could still see the boxes for everything like the drawing area and menu area but there were no icons or anything. There just gray boxes were everything should of been. Is that the computers doing or the program?