Voici le résultat de "whocrashed" 
  
computer name: DANIEL-PC 
windows version: Windows 7 , 6.1, build: 7600 
windows dir: C:\Windows 
CPU: GenuineIntel Intel® Core2 Duo CPU E4500 @ 2.20GHz Intel586, level: 6 
2 logical processors, active mask: 3 
RAM: 2952323072 total 
VM: 2147352576, free: 2009919488 
  
  
  
Crash Dump Analysis  
  
  
Crash dump directory: C:\Windows\Minidump 
  
Crash dumps are enabled on your computer. 
  
  
On Sat 27/08/2011 08:29:24 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082711-36800-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86A26008, 0xFFFFFFFF8FB298E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Sat 27/08/2011 08:29:24 GMT your computer crashed 
crash dump file: C:\Windows\memory.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl!TdrCreateRecoveryContext+0x1F2)  
Bugcheck code: 0x116 (0xFFFFFFFF86A26008, 0xFFFFFFFF8FB298E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Fri 26/08/2011 17:43:15 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082611-27003-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86A29008, 0xFFFFFFFF8FB1E8E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Fri 26/08/2011 17:36:57 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082611-27034-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86A0A008, 0xFFFFFFFF9412A8E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Fri 26/08/2011 17:25:57 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082611-25038-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86CFE008, 0xFFFFFFFF8FB268E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Fri 26/08/2011 13:24:41 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082611-33821-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF864B9008, 0xFFFFFFFF8FB2D8E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Fri 26/08/2011 12:43:53 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082611-25116-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86D5E008, 0xFFFFFFFF8FB358E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Thu 25/08/2011 16:07:15 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082511-24055-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF8630B008, 0xFFFFFFFF8FB238E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
On Wed 24/08/2011 22:00:00 GMT your computer crashed 
crash dump file: C:\Windows\Minidump\082511-26192-01.dmp 
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x8C92C)  
Bugcheck code: 0x116 (0xFFFFFFFF86CFB008, 0xFFFFFFFF8FB2A8E0, 0x0, 0x2) 
Error: VIDEO_TDR_ERROR 
file path: C:\Windows\system32\drivers\dxgkrnl.sys 
product: Microsoft® Windows® Operating System 
company: Microsoft Corporation 
description: DirectX Graphics Kernel 
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.  
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.  
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR 
  
  
  
  
The following dump files were found but could not be read. These files may be corrupt: 
C:\Windows\Minidump\082411-95191-01.dmp 
C:\Windows\Minidump\082511-93678-01.dmp 
C:\Windows\Minidump\082511-95269-01.dmp 
C:\Windows\Minidump\082511-96533-01.dmp 
C:\Windows\Minidump\082611-40232-01.dmp 
C:\Windows\Minidump\082611-74506-01.dmp 
C:\Windows\Minidump\082611-93584-01.dmp 
C:\Windows\Minidump\082611-95176-01.dmp 
  
  
  
  
Conclusion  
  
  
On your computer a total of 17 crash dumps have been found. Only 9 could be 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:  
  
dxgkrnl.sys (DirectX Graphics Kernel, Microsoft Corporation) 
  
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 actually 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.