|1.Power down your PC.|
2.Locate a rocker-style switch at the back of your PC (if
applicable), and switch it from the on position (I) to the off
position (O). If there is no switch disconnect the power cord
from power supply.
3.Find the 3-pin jumper near the power supply on the
motherboard, typically labeled "clear cmos" or "reset bios".
4.Remove the jumper from the default position (typically
connecting the 1st and 2nd pins).
5.Replace the jumper to connect the 2nd and 3rd pins.
6.Push the power button on the front of your PC once.
7.Wait a minute.
8.Return the jumper to its default position, connecting the 1st
and 2nd pins.
9.Move the rocker-style switch at the back of your PC (if
applicable), to the on (I) position.
10.Power on your PC with its front power button.
PS: Don't forget to configure your BIOS after this process.
Without any custom configuration, most systems should still
function adequately with their default settings.