Transcript Document

• BSoD
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BSOD
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The 'Blue Screen of Death' (also known as
a 'stop error', 'bluescreen', 'Blue Screen of
Doom', 'BSoD', 'bug check screen' or 'Stop
screen') is an error screen displayed after
a fatal system error.
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BSOD - History
BSoDs have been present in all Windowsbased operating systems since Windows 3.1.
(See History of Microsoft Windows.) BSoDs
can be caused by poorly written device
drivers or malfunctioning hardware, such as
faulty memory (computers)|memory, power
supply issues, overheating of components, or
hardware running beyond its specification
limits. In the Windows 9x era, incompatible
Dynamic-link library|DLLs or bugs in the
operating system Kernel (computer
science)|kernel could also cause BSoDs.
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BSOD - Incorrect attribution
In a follow up on 9 September 2014,
Raymond Chen complained about this
widespread mistake, claimed
responsibility for revising the BSoD in
Windows 95 and panned BGR.com for
having entirely fabricated a scenario
and posited it as real
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BSOD - Format
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For visually impaired users, Microsoft has
added a utility that allows the user to
change a setting in SYSTEM.INI that
controls the colors that the BSoD code
uses to any of the 16 CGA colors
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BSOD - Format
Windows 95, 98 and Me BSoDs use
80×25 text mode. BSoDs of Windows
NT family use 80×50 text mode on a
720×400 screen. Windows XP BSoDs
uses the Lucida Console font while the
Vista BSoD uses the Consolas font.
Windows Server 2012 uses Segoe UI
and renders the BSoD at native
resolution.
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BSOD - Windows NT
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Microsoft Windows can also be configured to
send live debugging information to a kernel
debugger running on a separate computer. If
a stop error is encountered while a live kernel
debugger is attached to the system, Windows
will halt execution and cause the debugger to
break in, rather than displaying the BSoD.
The debugger can then be used to examine
the contents of memory and determine the
source of the problem.
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BSOD - Windows NT
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A BSoD can also be caused by a critical
boot loader error, where the operating
system is unable to access the boot
partition due to incorrect storage
drivers, a damaged file system or
similar problems
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BSOD - Details
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Before Windows Server 2012, each BSoD
displayed an error name in uppercase
(e.g. APC_INDEX_MISMATCH), a
hexadecimal error number (e.g.
0x00000001) and four parameters. The
last two are shown together in the
following
format:[http://msdn.microsoft.com/enus/library/ms818748.aspx STOP:
0x00000001 (parameter, parameter,
parameter, parameter)
APC_INDEX_MIS]
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BSOD - Windows 9x
However, VxDs do not display BSoDs
frivolously — they usually indicate a
problem that cannot be fixed without
restarting the computer, and hence after a
BSoD is displayed the system is usually
unstable or unresponsive.
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BSOD - Windows 9x
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The most common BSoD is on a 25×80
screen which is the operating
system's way of reporting an interrupt
caused by a processor exception; it is
a more serious form of the general
protection fault dialog boxes. The
memory address of the error is given
and the error type is a hexadecimal
number from 00 to 11 (0 to 17
decimal). The error codes are as
follows:
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BSOD - Windows 9x
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In Windows 95 and 98, a BSoD occurs
when the system attempts to access
the file c:\con\con or c:\aux\aux on the
hard drive. This could be inserted on a
website to crash visitors' machines. On
16 March 2000, Microsoft released a
security update to resolve this issue.
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BSOD - Windows 9x
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In these systems, the true BSoD is seen only in
cases where the entire operating system crashes.
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BSOD - Windows 9x
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A famous instance of a Windows 9x BSoD
occurred during a presentation of a
Windows 98 Beta software|Beta by Bill
Gates at COMDEX on April 20, 1998: The
demo PC crashed with a BSoD when his
assistant, Chris Capossela, connected a
scanner to the PC to demonstrate
Windows 98's support for Plug and Play
devices. This event brought thunderous
applause from the crowd and Gates
replied after a nervous pause: That must
be why we're not shipping Windows 98
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BSOD - Mac OS X 10.5 Leopard
In the new Finder sidebar, all Windows
PCs connected to the same local network
of a Mac running Leopard are shown with
an icon representing an Old CRT monitor
displaying the blue screen of
death.[http://apple.bloks.cat/wpcontent/uploads/2007/06/bsod.jpg Leopard
Blue Screen of Death as you can see in
CoverFlow]
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BSOD - iPhone 5S
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The Verge attributes the blue screen and reboots
to iWork, a bundled app of iPhone
5S.[http://www.theverge.com/2013/10/11/4826934/i
phone-5s-blue-screen-reboots THE VERGE:
iPhone 5s users report 'Blue Screen Of Death'
reboots][http://www.iphoneincanada.ca/news/ipho
ne5s-blue-screen-of-death-iwork/ iPhone in
Canada: iPhone 5s's ‘Blue Screen of Death’ Bug
Affecting iWork for iOS
Users][http://www.imore.com/ios-7-blue-screendeath-caught-video-wild iMore: iOS 7 blue screen
of death caught on video] More possible problems
for the BSOD are iWork apps, when people multitask, FaceTime, Safari, Camera, and when people
press the home button
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