The Blue Screen of Death (BSoD) is the screen
displayed by Microsoft's Windows operating system when it cannot
(or is in danger of being unable to) recover from a system error.
There are two Windows error screens that are both referred to as
the blue screen of death, with one being significantly more serious
than the other.
The blue screen of death in one form or another has been present in
all Windows operating systems since Windows version 3.1 until about
2001 with the release of Windows XP. It is related to the black
screen of death in OS/2. In early builds of Windows Vista (then
called Longhorn) it was complemented with the red screen of death,
used for boot loader errors.
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