Computer just switched off at random, for the second time today. This time, it happened simultaneous with a power flux event (the air conditioner halting).

Maybe I need a UPS. :(

Just happened again. Third time today. Second time in an hour? No other electrical devices seemed to have any problems. I guess I should officially be worried. :(

@mcc Good luck.

Could be the outlet being flaky, which is probably your best case scenario. Cheap and generally pretty easy to swap out.