change from standard pc to ACPI, ho

my 2003 was all right before I reinstall it. and I wrongly set power ACPI disabled in BIOS. then I found in device manager that my computer is "Standard PC" , not "ACPI" . and I cannot shutdown without push power button, even if I set back power management ACPI enabled in BIOS. could you experts tell me how to change from Standard pc to ACPI ? . I right click computer in 'device manager' and tried to change driver , but thers is only 'standard pc' in the option lists. when I chose 'have disk' it ask me to specify an inf file. BUT, I don't know anything about such things help me please

It is a BIOS setting. You change it within the BIOS. However, when you do that, the current install of the OS you have will cease to work correctly. The reason is the Hardware Abstraction Layer (HAL) that is installed with the OS is different between ACPI and non-ACPI. The only way to change it from my understanding is reinstalling the OS completely after you set it to ACPI in the BIOS. MCSE, MCSA Messaging, baby!

c:\sysprep\acpi\devcon.exe sethwid @ROOT\PCI_HAL\0000 := !E_ISA_UP !ACPIPIC_UP !ACPIAPIC_UP !ACPIAPIC_MP !MPS_UP !MPS_MP !SGI_MPS_MP !SYSPRO_MP !SGI_MPS_MP c:\sysprep\acpi\devcon.exe sethwid @ROOT\ACPI_HAL\0000 := !E_ISA_UP !ACPIPIC_UP !ACPIAPIC_UP !ACPIAPIC_MP !MPS_UP !MPS_MP !SGI_MPS_MP !SYSPRO_MP !SGI_MPS_MP c:\sysprep\acpi\devcon.exe sethwid @ROOT\PCI_HAL\0000 := +ACPIPIC_UP c:\sysprep\acpi\devcon.exe sethwid @ROOT\ACPI_HAL\0000 := +ACPIPIC_UP c:\sysprep\acpi\devcon.exe update %windir%\inf\hal.inf ACPIPIC_UP

Are these the commands you used to reset your PC back to ACPI?