Before we start, I have booked an appointment with Apple for the coming Saturday, but in the mean time figured I would pick the brains of you lot. Right. I picked up this MacBook last week secondhand. It is only 5 weeks old, in mint condition and has full 3 years AppleCare. Installed everything on the Monday and it's been fine all week. About 30 mins ago it crashed, everything froze and was unresponsive. I shut it down, and rebooted. It wouldn't reboot. Tried several times but with no luck. It either hangs on the loading screen or it hangs on the loading screen like this: I have checked disks via disk util off the recovery partition, and run diagnostics. Both of which reported no issues. Anyone seen anything like this before, so I have a rough idea whether its hardware or software? Guess next thing is a reinstall.