So I'm not really sure why this is happening, but for a while now my laptop has been turning itself off after a while of being closed. Like, when I close the lid it goes to sleep but then if it stays like that for a while it shuts down. At first I wasn't really paying attention and I also wasn't using it often so I figured that it would go to sleep and in a few days the battery would just go dead (like I said i hadn't been using it very often at all) But I just noticed that actually my battery was full when turning it on. I also checked the "Change what closing the lid does" setting andit isn't set to power down. So what could be causing this, and how do I fix it?