what happens? I assumed it goes to sleep, but I left Skype and Facebook chats open (I never logged out) when I closed the lid, and this morning I had messages like, "Are you there?", "You must be busy...". And when i open the lid the chat pops up immediately... How do I change this in system preferences? That must mean everytime I've been thinking it's going to sleep, it hasn't been. That can't be good!! Also I know nothing about technology. Also thank you.