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Computer motherboard shutting down and restarting again automatically.

My computer was shutting down anywhere from one second to thirty minutes and then automatically restarting.
I eventually found that the motherboard had a dead flying-ant laying on the motherboard and causing a short with sometimes variable resistance, hence the variation in shut down times.
Cleaned the flying insect off and has been working fine since.

Had a similar thing happen a few years' ago and it was the same thing.

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