Asus A7N8X-E Deluxe - Manual (Page 52)

3-2 Chapter 3: Powering up
3.2 Powering off the computer
3.2.1 Using the OS shut down function
If you are using Windows 98/98SE/ME/NT/2000, click the Start button,
click Shut Down..., make sure that the Shut down option button is
selected, then the OK button to shut down the computer. The power
supply should turn off after Windows shuts down.
If you are using Windows XP, click the Start button, click Turn Off
Computer, then the Turn Off button to shut down the computer. The
power supply should turn off after Windows shuts down.
3.2.2 Using the dual function power switch
While the system is ON, pressing the power switch for less than 4 seconds
puts the system to sleep mode or to soft-off mode, depending on the BIOS
setting. Pressing the power switch for more than 4 seconds lets the
system enter the soft-off mode regardless of the BIOS setting. See section
“4.5 Power Menu” in Chapter 4.