What's going on when you plug in the power computer and turn it on automatically?

I encountered the situation: early in the morning to plug the computer power, but also did not move the computer power-on key, computer win7 system is automatically turned on, this is how the situation? How to solve this problem?

Probably more than the author has such a situation, many computer Windows XP system users are disconnected from the power supply board after the habit, but is often a problem, is a power supply board, the computer system will automatically boot up, the electric key in the form of a dummy.

WORKAROUND: Some motherboards have an option "Pwron after Pw-fail" in the "Power Management Setup" of the BIOS setting, and its default setting is "on", setting it to "off" and the next time the computer windows The XP system will not be powered on automatically. If you do not have this option, you can turn off the ACPI function in the power management of the operating system and turn it on again if it is turned off. Most motherboards have an option in the BIOS: in power MANAGEMENT setup, you can choose whether the state of the machine is automatically powered on or kept off or before the power is switched off after an accidental power outage. Please set the automatic boot to OFF.

In addition, the poor quality of the power supply or motherboard may cause similar problems to occur. ATX Motherboard startup needs to detect a capacitor level signal. If the XP system download in the power supply can not guarantee a good turn on, it will produce an instantaneous impact current, may make the power supply mistaken for the power-on signal, which led to a false boot.

See the above explanation, I do not know you clearly did not, but the power on the power-on of the situation is also a lot of people encounter, so in accordance with the above solution will let you solve the problem, may wish to try.