Ecran bleu Driver IRQL not found

Bonjour,

J' ai un acer aspire 5520 et un gros probleme aussi:

en effet , il me fait de plus en plus de crash dump, ecran bleu puis plus rien

j' ai lancé Whocrashed, voici son rapport:

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Analysis
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Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Thu 28/01/2010 11:25:56 your computer crashed
This was likely caused by the following module: ntkrnlpa.exe
Bugcheck code: 0x1000008E (0xC0000005, 0x81959DC9, 0x8FC98944, 0x0)
Error: KERNEL_MODE_EXCEPTION_NOT_HANDLED_M
Dump file: C:\Windows\Minidump\Mini012810-03.dmp
file path: C:\Windows\system32\ntkrnlpa.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit may be another driver on your system which cannot be identified at this time.

On Thu 28/01/2010 11:21:11 your computer crashed
This was likely caused by the following module: npfs.sys
Bugcheck code: 0xC5 (0xFC15FF5D, 0x2, 0x1, 0x818E752B)
Error: DRIVER_CORRUPTED_EXPOOL
Dump file: C:\Windows\Minidump\Mini012810-02.dmp
file path: C:\Windows\system32\drivers\npfs.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NPFS Driver
The crash took place in a standard Microsoft module. Your system configuration may be incorrect, possibly the culprit may be another driver on your system which cannot be identified at this time.

On Wed 27/01/2010 17:12:44 your computer crashed
This was likely caused by the following module: unknown_image
Bugcheck code: 0x1000008E (0xC0000005, 0x818E752B, 0x96C3FB64, 0x0)
Error: KERNEL_MODE_EXCEPTION_NOT_HANDLED_M
Dump file: C:\Windows\Minidump\Mini012710-01.dmp

The following dump files were found but could not be read. These files may be corrupt:
C:\Windows\Minidump\Mini012810-01.dmp

Cel aprle t il a quelqu un? est la carte graphique, la memoire ou des drivers?

Merci beaucoup !!

Configuration: Windows Vista Internet Explorer 7.0