Windows 7 machine starts up automatically when connected to power source

I recently got a Windows 7 laptop from my office. I am observing that it starts up (boot up/ wake up from hibernate) whenever it is connected to power source. This happens whether it is in shut down or is in hibernated state. There is no change of state when it is already powered on.

This does not happen in my personal laptop. Does anyone know of any option that is causing this? And how to disable this?


There is a similar thread on this site (Superuser) over here It appears to be helpful in your case.

Regards, dkp