Recently, my computer will shutdown itself in a random time inside
windows XP.

Sometimes it works a week, sometime few minutes, then shutdown.

The weird thing is it will start itself in a random time too (just
like somebody press the power button).



At the beginning, I though the PSU have problem. But this problem
still exist after I have replaced my PSU.

SO, did anyone have the same experience before? is my motherboard have
problem?



Any recommendation are welcome.



thanks