Blue screen de nouveau au bout d'un mois

Bonjour,

Je suis sous Vista, j'ai déjà eu le problème il y a un mois et après avoir décrasser mon ordi, plus de problèmes jusqu'à ce soir.
J'ai fait WhoCrashed et voilà le résultat de ma page bleue :

Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Mon 24/09/2012 15:13:30 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: Unknown ()
Bugcheck code: 0x50 (0xFFFFFFFFF7A00304, 0x0, 0xFFFFFFFF97AEB617, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
Bug check description: This indicates that invalid system memory has been referenced.
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: Unknown .
Google query: Unknown PAGE_FAULT_IN_NONPAGED_AREA

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Conclusion
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1 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:

unknown

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.

Que puis-je faire ? Aidez-moi, là j'ai vraiment peur !

Merci !