"BSOD" redirects here. It is not to be confused with Black screen of death. For the Person of Interest episode, see B.S.O.D. A blue screen of death (BSoD), officially known as a stop error or blue screen error, is an error screen that the Windows operating system displays in the event of a fatal system error. It indicates a system crash, in which the operating system has reached a critical condition where it can no longer operate safely, e.g., hardware failure or a unexpected termination of a crucial process. Blue error screens have been around since the beta version of Windows 1.0; if Windows found a newer DOS version than it expected, it would generate a blue screen with white text saying "Incorrect DOS version", before starting normally. In the final release (version 1.01), however, this screen would print garbage output instead. This screen was the outcome of a bug in the Windows logo code. It was not a crash screen, either; when the system did crash, it would e...
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