Why is this happening?Is there a way to change it? I thought that this happens only with Win 98 and 2000.
0 is right, I think it's motherboard related. If your mobo is really old it might not support automatic powering down regardless of the OS
go into power options and enable something like apc I'm not sure what its called again, but it will be something like apc it should have a check box to enable it.
i only saw this problem in the old computer but new computers automatically power off, in old computer you manually need to power off your computer. Nothing wrong with XP , this option is not supported by your PC.
The computer is Pentium 3. I got it from a friend.He had Win 98 SE and told me that he didn't have this "problem". I upgraded to Win XP Pro and since then this is happening.Anyway,I will go at BIOS setup and look if I can find a solution there.