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== It is now safe to turn off your computer. ==Remember this message from the early Windows 95 days? It is still present in Windows XP for uses that have purposely disabled ACPI during the Windows XP installation, or for installations that failed to install ACPI support. It is unlikely that a modern post Pentium 4 motherboard does not support ACPI.To have Windows XP automatically power down the computer when you choose to shut down Windows, you will need to ensure that ACPI support is installed during the Windows XP installation. It cannot be added later.Many users report this condition when installing Windows XP on a newer laptop computer. The laptop computer's type of BIOS was unclear to the Windows XP installer. Reinstall Windows XP and use the F5 technqiue mentioned above to manually select the ACPI type. You may have to manually load a driver, from a floppy disk, provided by the laptop manufacturer.