Several times over the last month I have come down to my computer only to have found that it has restarted in the night. I checked to see that it wasn't a vista update and there was none. Is there a way I can tell what caused this and why? I just installed vista in December and all else seems to be working great. Thanks. I am running vista ultimate 64 bit.
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Disable Automatic Restart under System Failure and see if there's an error message on the screen.
Are you sure you did not have a primary power fluctuation or interuption during the night?