After working fin for 9 month my powerbook has quit the service. 20 seconds after typing of the password the screen gets grey and shows an image of the power button and the information that I have to restart written in 5 laguages. Only the power butten still works, keyboard and touchpad are switched off. In the background you can see a information window, that the session has been interrupted unawaited. Is that a virus. Does anybody Know, what to do? Thanks!