Isaac Asimov had a series of short stories written in the form of conversations between the writer and a friend named George. George claims to have discovered how to summon a demon, and the conversations are about that demon. The demon is not allowed to directly help George, but he will do favors for George's friends.
These favors invariably do not turn out good for the friend. Each story is basically George telling the author the tale of one of these favors, and the writer trying to make sure George does not ask the demon to do any favors for the writer.
Anyway, in one of the stories George had a friend who wants to be able to do something to have a big positive impact on the world. George told the demon about this, and the demon said he'd help.
The next time George encountered that friend, the friend told George that he had been having all kinds of problems with computers. He'd go into his bank to cash a check, and when he'd get to the teller their computer would stop working. And it wasn't just the bank...anyone he encountered who was using a computer would find that their computer crashed when the friend came near. His mere presence seemed to be enough to crash computers.
This was, of course, making the friend's life miserable, and this was in the 1980s. If it kept happening it would get even worse, as computers were clearly going to become more and more common in everyday life.
George found out from the demon what had happened. The demon had indeed (irreversibly) made it so that computers could not work when the friend was near, in order to grant the wish to make a big positive impact. The demon says that when the friend is an old man humanity will be enslaved by an uprising of intelligent computers, and the friend will be the weapon that humanity will use to defeat the computers and regain freedom.