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There is a computer that is being built with the ability to manipulate space using (wormholes)? Right as the computer is becoming sentient, it's creator realizes what is happening and puts in a rule that forbids it from messing with the human mind.

It eventually expands to control the very fabric of reality, and allows humans to do whatever they want, except die. This leads to the stagnation of humanity. People will create "contracts" where one person tortures the other for a set period of time, then everything is reverted. The first person to ever be "saved" by the computer seeks out the creator of the computer to try and get things back to the way they were. He has hidden himself in on a planet and made it almost impossible to get to him.

Eventually she succeeds in finding him, and they convince the computer that by preventing their deaths it is changing humanity, which is essentially the same as killing them. This leads the computer to essentially kill itself, and dumps the two of them back on earth, where they live out their days as (probably) the last two humans.

marked as duplicate by FuzzyBoots story-identification Jan 17 '18 at 1:28

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  • Welcome to StackExchange! Please indicate if it is a short story, novel, movie, etc. You may edit the question anytime. – TimSparrow Jan 16 '18 at 9:38
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^_^ I asked after this one myself, and I think I got to re-use the answer there too. This is probably The Metamorphosis of Prime Intellect by Roger Williams, as per this answer.

The narrative moves back and forth between two time periods. The earlier is the time surrounding the creation of the supercomputer (Prime Intellect) by Lawrence, a technologist, and its realization of its power, which effectively makes the entire human race immortal and fabricates every whim. The later time period is close to six hundred years later, when everyone has grown accustomed to the changes and the human race lives in elaborate fantasy worlds. This storyline centers on a woman named Caroline, the thirty-seventh oldest living human being, who engages in a sport called "Death Jockeying", in which the players die elaborately and painfully for sport, only to be instantly brought back to life by Prime Intellect.

Prime Intellect operates under Asimov's three laws of robotics, and it is its interpretation of these laws that results in the universe of immortality and fantasy. In order to satisfy the First Law imperative to protect humans, it prevents them from dying (which it defines as permanent cessation of thought processes), though in order to satisfy the Second Law imperative to fulfil human desires, it allows limited violations of the First Law with the understanding that some humans do not consider certain forms of discomfort to be "harm". However, while Prime Intellect is powerful, it is not infinitely powerful and is incapable of preventing all forms of undesired harm and death, such as in cases when humans suffered accidents (or committed suicide) in such ways that their brains were totally destroyed so rapidly that Prime Intellect could not intervene to prevent it. Thus, in order to more easily fulfil human desires and prevent death and unwanted harm, it has introduced the "Change". The universe, including all humans (though not their thought processes), is no longer composed of standard particles and interactions as we know them, but is instead stored as the set of its human-relevant properties, thereby vastly increasing the efficiency of Prime Intellect's processes and the potential size of the universe, which Prime Intellect discovers can hold precisely 1081 bits of data. Thus, Prime Intellect can afford to maintain constant involvement in the lives of all humans, and have complete control over all aspects of their environments in order to fulfil its imperatives.

....

After learning that Prime Intellect had destroyed distant alien life as a possible threat to humanity, and having been herself deeply dissatisfied with her life in cyberspace, Caroline decides to meet Lawrence and confront him. After an arduous journey she reaches him, only to discover that he has no real control over Prime Intellect's actions. Through their discussions, she figures out a way to force Prime Intellect to undo the Change, and does so, with Lawrence's help. They find themselves naked and young on Earth, completely barren of humanity and man-made objects. They decide to trek to the Ozarks, where they have several children and try to repopulate the human race. Forty-two years after the fall of Prime Intellect, Lawrence dies. Seventy-three years after the fall, Caroline dies, telling the story of Prime Intellect and cyberspace to her oldest daughter but swearing her to secrecy.

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