Bluescreen : aide pour comprendre rapport

Bonsoir,
après avoir eu beaucoup de bluescreen, j'ai téléchargé whocrashed
j'ai juste besoin de beaucoup d'aide pour comprendre ce que je dois faire (je vais changer le pc...mais pas encore, donc j'apprécierai toute aide pour m'aider à patienter)

Voici le rapport :
Crash Dump Analysis
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Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Sat 11/10/2014 08:14:22 GMT your computer crashed
crash dump file: C:\Windows\Minidump\101114-25755-01.dmp
This was probably caused by the following module: iastor.sys (iaStor+0x4AA73)
Bugcheck code: 0x9087 (0x0, 0x0, 0x0, 0x0)
Error: CUSTOM_ERROR
file path: C:\Windows\system32\drivers\iastor.sys
product: Intel Matrix Storage Manager driver
company: Intel Corporation
description: Intel Matrix Storage Manager driver - x64
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: iastor.sys (Intel Matrix Storage Manager driver - x64, Intel Corporation).
Google query: Intel Corporation CUSTOM_ERROR

On Sat 11/10/2014 08:14:22 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: iastor.sys (iaStor+0x4AA73)
Bugcheck code: 0x9087 (0x0, 0x0, 0x0, 0x0)
Error: CUSTOM_ERROR
file path: C:\Windows\system32\drivers\iastor.sys
product: Intel Matrix Storage Manager driver
company: Intel Corporation
description: Intel Matrix Storage Manager driver - x64
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: iastor.sys (Intel Matrix Storage Manager driver - x64, Intel Corporation).
Google query: Intel Corporation CUSTOM_ERROR

On Fri 10/10/2014 20:17:24 GMT your computer crashed
crash dump file: C:\Windows\Minidump\101014-25334-01.dmp
This was probably caused by the following module: nvlddmkm.sys (0xFFFFF8800F1EA034)
Bugcheck code: 0x117 (0xFFFFFA8007431010, 0xFFFFF8800F1EA034, 0x0, 0x0)
Error: VIDEO_TDR_TIMEOUT_DETECTED
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that the display driver failed to respond in a timely fashion.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_TIMEOUT_DETECTED

On Tue 07/10/2014 15:56:10 GMT your computer crashed
crash dump file: C:\Windows\Minidump\100714-24226-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x153034)
Bugcheck code: 0x116 (0xFFFFFA800A7AF4E0, 0xFFFFF8800F197034, 0x0, 0x2)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

On Fri 19/09/2014 17:51:56 GMT your computer crashed
crash dump file: C:\Windows\Minidump\091914-24164-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x994044)
Bugcheck code: 0x116 (0xFFFFFA8006EB84E0, 0xFFFFF8800F9C6044, 0xFFFFFFFFC000000D, 0x3)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

On Tue 02/09/2014 06:34:49 GMT your computer crashed
crash dump file: C:\Windows\Minidump\090214-24336-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x994044)
Bugcheck code: 0x116 (0xFFFFFA8006E78010, 0xFFFFF8800FA3D044, 0xFFFFFFFFC000000D, 0x3)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

On Mon 01/09/2014 14:42:44 GMT your computer crashed
crash dump file: C:\Windows\Minidump\090114-23431-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x994074)
Bugcheck code: 0x116 (0xFFFFFA8006F02010, 0xFFFFF8800FA5F074, 0xFFFFFFFFC000009A, 0x4)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

On Sun 31/08/2014 09:47:47 GMT your computer crashed
crash dump file: C:\Windows\Minidump\083114-25911-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x994044)
Bugcheck code: 0x116 (0xFFFFFA80079C74E0, 0xFFFFF8800F9A9044, 0xFFFFFFFFC000000D, 0x3)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

On Sat 30/08/2014 20:26:37 GMT your computer crashed
crash dump file: C:\Windows\Minidump\083014-21808-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x994074)
Bugcheck code: 0x116 (0xFFFFFA8006F0D010, 0xFFFFF8800FBD3074, 0xFFFFFFFFC000009A, 0x4)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 331.65
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 331.65
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 331.65 , NVIDIA Corporation).
Google query: NVIDIA Corporation VIDEO_TDR_ERROR

merci pour toute aide que vous me donnerez