Blue screen of death

The blue screen of death (BSoD), blue screen error, blue screen, fatal error, or bugcheck, and officially known as a stop error, is a critical error screen displayed by the Microsoft Windows and ReactOS operating systems 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.

"BSoD" redirects here. For the Person of Interest episode, see B.S.O.D.
Not to be confused with Black screen of death.

Possible issues include hardware failure, an issue with or without a device driver, or unexpected termination of a crucial process or thread.

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