Hi, this morning I was sleeping but I was almost half awake when suddenly something woke me up and I saw my PC booting up. I was quite shocked as nothing like that ever happened to me. How is this even possible? Is there reason to worry about my PC or about having poltergeist in the house?
Check your BIOS for features like wake-up on keyboard, wake-up on LAN or somesuch.
I used to have my PC set to wake up on any keypress, which was every now and then triggered by a curious cat.