Hi, I'm new to this site, as to any forums in general, but I was wondering if someone would help me identify what's wrong with my laptop. It's been used for at least two good years and 've been working better or worse, I'm currently running W8, I've cleaned it many times and it isn't overheating (as far as I can tell by checking the fan. The problem is that after an hour or so of use, it just goes to the Shutting down... screen. Sometimes it shuts down during a game, sometimes during a video or if I wait long enough it'll shut down on the desktop without any apps running. It's really frustrating and weird, there are no errors or any indications as to why it shuts down. Happened about 20 times for the past few days. Ideas?