I would try to ask him why he doesn't like the computer. Is there a valid reason for his request. If not then say it is an unreasonable request and another attempt at being in control.

As hard as it is you have to remind him that he isn't your boss. He doesn't have the right to control what you do.

Its easy to forget that with some people. The more your buckle the more they request. You have to set your boundary and stick to it. If he hells tell him to stop and if he doesn't leave. Go for a walk. You don't have to put up with his anger. He needs to learn how to deal with things without shouting and jumping down your throat.