Computer crashes and restarts sometimes when playing games (Diablo 3)

When I am playing video games like Diablo 3 and Team Fortress 2, my computer usually crashes and sometimes restarts. I believe that the graphics card driver crashed. I have an EVGA nVidia GTX 460. It happens at random times from 10-30 minutes through the game. I haven't tried a lot of things. This happened once while not playing games. I tried to download beta drivers but the install would fail.

When my computer restarts, a poop up comes up and says Windows has recovered from an unexpected shutdown and shows these details:


Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: 116
BCP1: FFFFFA8006F834E0
BCP2: FFFFF8800F19E4D4
BCP3: 0000000000000000
BCP4: 0000000000000002
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\071312-60731-01.dmp
C:\Users\Vandy\AppData\Local\Temp\WER-80387-0.sysdata.xml *

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C:\Windows\system32\en-US\erofflps.txt

*I can't find or open that file anymore

I have had this computer for a year and it recently started when playing Diablo III.

OS: Windows 7 Home Premium 64-bit
Processor: Intel(R) Core (TM) i7 CPU 870 @ 2.93GHz (8 CPUs), ~2.9 GHz
RAM: 8 GB DDR3
DirectX 11
Video Card: nVidia GTX 460
Motherboard: MSI H55M-E23(MS-7636) 3.0
BIOS: American Megatrends Inc. V17.2

I recently opened all the dump files and they all look the same except for the file name and the times.

Bug Check Code: 0x00000116
Parameter 1:fffffa80`0ab274e0
Parameter 2:fffff880`0f1aa4d4
Parameter 3:00000000`00000000
Parameter 4:00000000`00000002
Caused By Driver: dxgkrnl.sys
Caused by Address: dxgkrnl.sys+5d000
Processor: x64
Crash Address: ntoskrnl.exe+7f1c0
Processors Count: 8
Major Version: 15
Minor Version 7601

All the other information was not useful or filled.

Any question, feel free to ask.