Joe Cho wrote:

> The real problem is that the computer I am using ( due to my financial
budget) is Emachine model T2042. Originally it come with Windows XP Home
> edition  and doesn't auto boot after the power was interrupt.

  Generally, this is a BIOS setting:

    1.  Never come back on after power failure.
    2.  Always "  "
    3.  Only come back on if it was on before the power went off.