Not that I speak German or anything, but the first thought I had when I saw that kid going crazy like that at his computer was probably that he was playing/trying to play a video game.
C'mon it can be harsh sometimes how your just wont coorperate with you.
Let's put ourselves on the kid's shoes.
He goes to the store with the intentions of buying a PC game, I don't know maybe it's his birthday, or it's just a game that he had been saving money to buy for the longest time, he inspects the video game case and in the back he sees that it is compatible with the computer system he has.
So he buysthe game, stuffs it in his backpack, goes outside jumps on his bike and flies home. When he gets home all excited, he runs up the stairs skipping every 2 steps. He turns his computer on, at the same time rips the game out of it's box and pops it in the CD-R floppy. Now it's when the problems starts....
No matter how much he tries to start the CD-R, all he gets is error messages. So he keeps trying...trying...trying, after all it is in his youthful nature not to give up easily.
How would you react on this situation? Remember it's your favorite game, and it does not want to work.
...relieve some tension I bet.
All for now, see you later...