WhoCrashed : je ne comprends pas le rapport

Bonjour,
Mon écran est devenu bleu, s'est bloqué...Par contre, il a redémarré sans problème. Une recherche sur ce forum m'a permis de voir que WhoCrashed m'aiderait à comprendre le problème

Voici le rapport :
System Information (local)
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computer name: NANIE-PC
windows version: Windows 7 Service Pack 1, 6.1, build: 7601
windows dir: C:\Windows
Hardware: Aspire X3812, Acer, WG43M
CPU: GenuineIntel Intel(R) Core(TM)2 Quad CPU Q8300 @ 2.50GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 8589070336 total




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Crash Dump Analysis
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Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Thu 31/07/2014 13:32:51 GMT your computer crashed
crash dump file: C:\Windows\Minidump\073114-26005-01.dmp
This was probably caused by the following module: dxgmms1.sys (dxgmms1+0x20E2F)
Bugcheck code: 0x1000007E (0xFFFFFFFFC0000005, 0xFFFFF8800425CE2F, 0xFFFFF880053EF668, 0xFFFFF880053EEEC0)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
file path: C:\Windows\system32\drivers\dxgmms1.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: DirectX Graphics MMS
Bug check description: This indicates that a system thread generated an exception which the error handler did not catch.
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 Thu 31/07/2014 13:32:51 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: dxgmms1.sys (dxgmms1!VidMmInterface+0xF56F)
Bugcheck code: 0x7E (0xFFFFFFFFC0000005, 0xFFFFF8800425CE2F, 0xFFFFF880053EF668, 0xFFFFF880053EEEC0)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED
file path: C:\Windows\system32\drivers\dxgmms1.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: DirectX Graphics MMS
Bug check description: This bug check indicates that a system thread generated an exception that the error handler did not catch.
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.




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Conclusion
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2 crash dumps have been found and analyzed. No offending third party drivers have been found. Connsider using WhoCrashed Professional which offers more detailed analysis using symbol resolution. Also configuring your system to produce a full memory dump may help you.

Est ce que quelqu'un pourrait m'aider à le comprendre et me dire quoi faire.. j'avoue être perdue

Merci par avance pour l'aide que vous m'apporterez