I have a MacBook (13 inch, early to mid 2009, running OS X 10.8.3) and tonight it started shutting down randomly. It was working fine, and then I tried to watch a tv show on abc.com and about a minute into the video, the machine shut down completely. I tried to turn it on and it wouldn't turn on, even in safe mode. After several attempts a few minutes apart, it turned on. I then went to hulu.com to try to watch the same show, and it happened again. I'm sure you'll need the crash logs, but at the risk of sounding like a total dumdum, where do I find those?