enter power on password key

[sacarter]

I need to unlock my desk top all in one computer. When you turn the computer on it has enter power-on password key.  Can anyone tell me how to unlock this computer.

[CF4]

Hi

Could you try removing the CMOS battery?

1. Turn off your computer and unplug it. For laptops make sure you remove the battery as well.
2. Open the computer and look inside to find the small silver CMOS battery. It’s about the size of a quarter.
3. Remove the battery.
4. With the battery removed and the computer unplugged press and hold the power button for about twenty seconds. This will make sure there is absolutely no power left in your computer.
5. If there is a jumper near the battery labeled something like “CMOS” then remove it, wait twenty seconds, then put it back the way it was.
6. Put the CMOS battery back in. Close up your computer.
7. Plug your computer back in and turn it on