Are you saying Windows shuts down or the power supply shuts down? These are two different issues with different causes. Power supply shut downs are usually due to a detected overload. This could be due to a heat issue, weak power supply, or some internal component failure. More details would be helpful including such as your machine's make/model, age, PS wattage, etc.
i hv been having this problem since the last few days.
my pc just shuts down while im working and this happens atleast twice a day.
when i start my pc again, the microsoft send report thing appears and it says the computer has recovered from a serious error.
when i click on the "more info about this error," a it tells me steps how i can fix this problem.
but none of the solutions work.
pls help me. thnx.