Evening everybody! I have been facing this problem for a few days already. My computer wil go blue screen from time to time without hinting me before it happens. I have no idea why this happened and the computer just restarts. Could anyone help me out? Thank you for your kindness 
I have done the analysis using WhoCrashed. Could anyone teach me the second step?
Once again Thank you
Crash Dump Analysis
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Crash dump directory: C:\Windows\Minidump
Crash dumps are enabled on your computer.
On Thu 2/10/2014 15:36:39 GMT your computer crashed
crash dump file: C:\Windows\Minidump\100214-19250-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0xB12AC)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF880114E62AC, 0xFFFFF8800C940950, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\Windows\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_SERVICE_EXCEPTION
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Conclusion
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One crash dump has been found and analyzed. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:
atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.)
If no updates for these drivers are available, try searching with Google on the names of these drivers in combination the errors that have been reported for these drivers and include the brand and model name of your computer as well in the query. This often yields interesting results from discussions from users who have been experiencing similar problems.
Read the topic general suggestions for troubleshooting system crashes for more information.
Note that it's not always possible to state with certainty whether a reported driver is responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.
I have done the analysis using WhoCrashed. Could anyone teach me the second step?Once again Thank you
Crash Dump Analysis
--------------------------------------------------------------------------------
Crash dump directory: C:\Windows\Minidump
Crash dumps are enabled on your computer.
On Thu 2/10/2014 15:36:39 GMT your computer crashed
crash dump file: C:\Windows\Minidump\100214-19250-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0xB12AC)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF880114E62AC, 0xFFFFF8800C940950, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\Windows\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_SERVICE_EXCEPTION
--------------------------------------------------------------------------------
Conclusion
--------------------------------------------------------------------------------
One crash dump has been found and analyzed. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:
atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.)
If no updates for these drivers are available, try searching with Google on the names of these drivers in combination the errors that have been reported for these drivers and include the brand and model name of your computer as well in the query. This often yields interesting results from discussions from users who have been experiencing similar problems.
Read the topic general suggestions for troubleshooting system crashes for more information.
Note that it's not always possible to state with certainty whether a reported driver is responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.
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