I could see parallels between an evil AI and a haunted house, the conflict is in trying to escape its domain. An evil AI can be like a 'digital ghost', possess technology stuff via internet connections, wireless signals, electricity and so on.
As this is the After Sundown setting, your supercomputers could have some kind of supernatural power source for a literal ghost (or demon) in the machine.
There's also tinfoil hat conspiracies about technology used to mind control people via invisible waves.
Found a wiki entry on this kind of thing, 'mind control machines' are mentioned even in 1919:
https://en.wikipedia.org/wiki/On_the_Or ... izophrenia
The paper describes Tausk's observations and psychoanalytic interpretation of a type of paranoid delusion that occurs in patients diagnosed with schizophrenia. The delusion often involves their being influenced by a 'diabolical machine', just outside the technical understanding of the victim, that influences them from afar. It was typically believed to be operated by a group of people who were persecuting the individual, whom Tausk suggested were "to the best of my knowledge, almost exclusively of the male sex" and the persecutors, "predominantly physicians by whom the patient has been treated".
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"The schizophrenic influencing machine is a machine of mystical nature. The patients are able to give only vague hints of its construction. It consists of boxes, cranks, levers, wheels, buttons, wires, batteries, and the like. Patients endeavor to discover the construction of the apparatus by means of their technical knowledge, and it appears that with the progressive popularization of the sciences, all the forces known to technology are utilized to explain the functioning of the apparatus. All the discoveries of mankind, however, are regarded as inadequate to explain the marvelous powers of this machine, by which the patients feel themselves persecuted."
"The main effects of the influencing machine are the following:
It makes the patient see pictures. When this is the case, the machine is generally a magic lantern or cinematograph. The pictures are seen on a single plane, on walls or windowpanes, and unlike typical visual hallucinations are not three-dimensional.
It produces, as well as removes, thoughts and feelings by means of waves or rays or mysterious forces which the patient's knowledge of physics is inadequate to explain. In such cases, the machine is often called a 'suggestion-apparatus.' Its construction cannot be explained, but its function consists in the transmission or 'draining off' of thoughts and feelings by one or several persecutors.
It produces motor phenomena in the body, erections and seminal emissions, that are intended to deprive the patient of his male potency and weaken him. This is accomplished either by means of suggestion or by air-currents, electricity, magnetism, or X-rays.
It creates sensations that in part cannot be described, because they are strange to the patient himself, and that in part are sensed as electrical, magnetic, or due to air-currents.
It is also responsible for other occurrences in the patient's body, such as cutaneous eruptions, abscesses, or other pathological processes."