According to Gates, there are two main ways artificial intelligence could become harmful: it could eventually substitute some human labour in the workplace, and it could grow to become more intelligent than humans.

The labour problem is solvable because what you are really talking about is an embarrassment of riches. But since it is happening so quickly. It does raise some very interesting questions given the speed with which it happens.

The next problem will be the issue of greater-than-human intelligence. T

"That one, I'll be very interested to spend time with people who think they know how we avoid that. I know Elon Musk just gave some money. A guy at Microsoft, Eric Horvitz, gave some money to Stanford. I think there are some serious efforts to look into could you avoid that problem," he said.

After all no intelligent computer would have designed Vista or allowed Windows 8 to be ruined by a tablet obsession.

Still all you need to do to take control of computers is to make sure you have total control of the on off switch or program a blue screen of death in case it annoys you