I am trying to restore a HP laptop to original manf. settings and am getting an error saying that I am not plugged in and cannot proceed using battery power. I also get the same error when i try to re-flash the bios. I have checked everything I know to check and nothing says it is not plugged in except the warning. System check says there are no problem devices. I also made sure drivers were up to date. When this warning pops up the computer will not close out of any windows. i actually have to force shut it down using power button. Any ideas?