Plantages plantage et plantage

Bonjour,
Mon PC VISTA n'arrête pas de planter. La souris se bloque, l'image figée.....
J'ai lancé WHOCRASHED : voici le rapport. Please, l'un d'entre vous peut-il m'aider, car je n'arrive pas à bosser en continue. Par avance, merci mille fois.
System Information (local)
--------------------------------------------------------------------------------

computer name: PC-DE-FAT
windows version: Windows Vista Service Pack 2, 6.0, build: 6002
windows dir: C:\Windows
CPU: GenuineIntel Intel(R) Pentium(R) Dual CPU E2140 @ 1.60GHz Intel586, level: 6
2 logical processors, active mask: 3
RAM: 1072181248 total
VM: 2147352576, free: 1961644032




--------------------------------------------------------------------------------
Crash Dump Analysis
--------------------------------------------------------------------------------

Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Sun 20/01/2013 12:30:43 GMT your computer crashed
crash dump file: C:\Windows\Minidump\Mini012013-02.dmp
This was probably caused by the following module: hal.dll (hal+0x5059)
Bugcheck code: 0xA (0x4152499A, 0x2, 0x0, 0xFFFFFFFF83BCE059)
Error: IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\hal.dll
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: Hardware Abstraction Layer DLL
Bug check description: This indicates that Microsoft Windows or a kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
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 that cannot be identified at this time.



On Sun 20/01/2013 12:30:43 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: hal.dll (hal+0x5059)
Bugcheck code: 0xA (0x4152499A, 0x2, 0x0, 0xFFFFFFFF83BCE059)
Error: IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\hal.dll
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: Hardware Abstraction Layer DLL
Bug check description: This indicates that Microsoft Windows or a kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
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 that cannot be identified at this time.



On Sun 20/01/2013 01:21:36 GMT your computer crashed
crash dump file: C:\Windows\Minidump\Mini012013-01.dmp
This was probably caused by the following module: ar5211.sys (ar5211+0x3AB8C)
Bugcheck code: 0xD1 (0xFFFFFFFF88F24971, 0x2, 0x0, 0xFFFFFFFF88F24971)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\drivers\ar5211.sys
product: Atheros AR5001 Wireless Network Adapter
company: Atheros Communications, Inc.
description: Driver for Atheros AR5001 Wireless Network Adapter
Bug check description: This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high.
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: ar5211.sys (Driver for Atheros AR5001 Wireless Network Adapter, Atheros Communications, Inc.).
Google query: Atheros Communications, Inc. DRIVER_IRQL_NOT_LESS_OR_EQUAL



On Sat 19/01/2013 21:58:00 GMT your computer crashed
crash dump file: C:\Windows\Minidump\Mini011913-01.dmp
This was probably caused by the following module: ntfs.sys (Ntfs+0x19FFF)
Bugcheck code: 0x24 (0x1904AA, 0xFFFFFFFFAEC1A9C0, 0xFFFFFFFFAEC1A6BC, 0xFFFFFFFF838759D0)
Error: NTFS_FILE_SYSTEM
file path: C:\Windows\system32\drivers\ntfs.sys
product: Système d'exploitation Microsoft® Windows®
company: Microsoft Corporation
description: Pilote du système de fichiers NT
Bug check description: This indicates a problem occurred in the NTFS file system.
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 that cannot be identified at this time.




--------------------------------------------------------------------------------
Conclusion
--------------------------------------------------------------------------------

4 crash dumps have 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:

ar5211.sys (Driver for Atheros AR5001 Wireless Network Adapter, Atheros Communications, 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 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.