Suddenly shutdown just like when unplugging power



Hi everyone. I have this problem, while working my computer suddenly
shutdown without any warning, just like when I unplug the power. First
I think power problem on casing power supply (I'm using ups). Then, I
remove the power supply and change it with the new one. But after a few
days it occurs again, and the time interval is randomize. I'm
suspecting motherboard problem or virus problem. Could someone give me
clue or suggestion on my problem? Thanks in advance.

.



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