My Toshiba Satellite A75 seems to run very hot when it's plugged in. I notice when I'm running on battery power, this does not happen. The bummer is that the battery doesn't last very long. I wonder if I should get a new battery and a/c adapter. The adapter gets very hot as well. I don't want to spend the money on these things if it's not going to make a bit of difference. Any advice?