Death at switching off of the computer.
Bug Report May 3 1 Exactly like Masked has stated, There is no restoring a Hardcore Character that has died. This is fully intentional.In Diablo 2, you could keep your character alive by switching off your computer/disconnect router/ Alt+F4, etc..They did not want people doing this same trick in D3. So when in combat and you are suddenly disconnected, the game begins a countdown. After 10 seconds the game will fully remove your character from the game. During that 10 seconds, your character just stands there doing nothing. It is fully possible to die in those 10 seconds.