My PC wakes up on its own following hibernation. Have no idea why. It can happen any time in the first half hour after being hibernated. I thought hibernate meant "turned off"??!! Very frustrating. Any ideas anyone? A clue is that I am connected to the internet via ADSL router, wired. I am running diskeeper defragment on scheduled overnight job, and that is in theory meant to be trying to start during the time when the PC is hibernating. But otherwise, absolutely stuck! Anyway, like I say, as far as I am concerned the PC Is turned OFF when it is hibernating!