Asus P4P800 SE - Manual (Page 60)

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/2000:
1. Click the Start button then click Shut Down...
2. Make sure that the Shut down option button is selected, then click the
OK button to shut down the computer.
3. The power supply should turn off after Windows shuts down.
If you are using Windows ® XP:
1. Click the Start button then select Turn Off Computer.
2. Click the Turn Off button to shut down the computer.
3. 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.