Mon ordinateur "crash" constamment lorsque je lance un jeu...

Bonjour,

Depuis deux jours, mon ordinateur s'éteint tout seul après quelques minutes passées sur des jeux-vidéos (je n'ai pas le problème en restant sur internet).
Alors voilà, lorsque je lance un jeu, quelques minutes plus tard, l'écran se fige, affiche un écran bleu et redémarre.
J'ai eut le droit à deux messages d'erreur sur les écrans bleus:
(Je suis sous windows 8)

":(
Votre ordinateur a rencontré un problème et doit redémarrer. Nous collections simplement des informations relatives aux erreurs puis nous allons redémarrer l'ordinateur.
Pour en savoir plus vous pouvez rechercher cette erreur en ligne: DPC_WATCHDOG_VIOLATION"
OU
"...
Pour en savoir plus vous pouvez rechercher cette erreur en ligne: KMODE_EXCEPTION_NOT_HANDLED (nvlddmkm.sys)"

J'ai donc recherché ces erreurs en ligne, il semblerait que ce soit un problème de mise à jour de pilotes mais je ne m'y connais pas trop.
On m'a conseillé d'installer WhoCrashed et de lancer une analyse, que voici:

"System Information (local)

Computer name: EMERIC
Windows version: Windows 8.1 , 6.3, build: 9600
Windows dir: C:\WINDOWS
Hardware: Aspire E1-571G, Acer, EA50_HC_HR
CPU: GenuineIntel Intel(R) Core(TM) i3-2348M CPU @ 2.30GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 6246658048 bytes total

Crash Dump Analysis

Crash dump directory: C:\WINDOWS\Minidump

Crash dumps are enabled on your computer.

On Sat 30/01/2016 11:13:24 GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\013016-21218-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14F9A0)
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\WINDOWS\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might be caused by a thermal issue.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.

On Sat 30/01/2016 11:13:24 GMT your computer crashed
crash dump file: C:\WINDOWS\memory.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x198CA5)
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\WINDOWS\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 327.02
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 327.02
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might be caused by a thermal issue.
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 327.02 , NVIDIA Corporation).
Google query: NVIDIA Corporation DPC_WATCHDOG_VIOLATION

Conclusion

2 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:

nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 327.02 , NVIDIA Corporation)

If no updates for these drivers are available, try searching with Google on the names of these drivers in combination with the errors that have been reported for these drivers. Include the brand and model name of your computer as well in the query. This often yields interesting results from discussions on the web by 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 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."

Les tentatives que j'ai fait:
- Mettre à jour le pilote automatiquement à partir du panneau de config
- https://www.commentcamarche.net/faq/26313-plantage-de-nvlddmkm-sys-la-solution
- https://www.nvidia.fr/Download/Scan.aspx?lang=fr

Le problème semble venir de "nvlddmkm.sys" !

Quelqu'un pourrait-il m'apporter son aide et éventuellement trouver une solution ?

Merci bien !