My macbook pro shuts down when I get up to do something. I leave it unattended for less than a minute and it just shuts down. But when Im using it it doesnt shut down! I have this laptop for about 4 years already, and recently the battery inflated and i took it to the store and they told me that I need a new one and they took it out. Im just using the Magsafe to get power. Why do you think it shuts down when im not present?? Might it be that the battery ruined the heat sensors in the trackpad or something like that?? but why would it shut down? PLease help!!