Windows 7: Random Unexpected Shutdown

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*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 116, {849d7348, 9084df20, 0, d}

*** WARNING: Unable to verify timestamp for igdkmd32.sys
*** ERROR: Module load completed but symbols could not be loaded for igdkmd32.sys
Probably caused by : igdkmd32.sys ( igdkmd32+11f20 )

Followup: MachineOwner
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0: kd> !analyze -v
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*                        Bugcheck Analysis                                    *
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VIDEO_TDR_FAILURE (116)
Attempt to reset the display driver and recover from timeout failed.
Arguments:
Arg1: 849d7348, Optional pointer to internal TDR recovery context (TDR_RECOVERY_CONTEXT).
Arg2: 9084df20, The pointer into responsible device driver module (e.g. owner tag).
Arg3: 00000000, Optional error code (NTSTATUS) of the last failed operation.
Arg4: 0000000d, Optional internal context dependent data.

Debugging Details:
------------------


FAULTING_IP: 
igdkmd32+11f20
9084df20 55              push    ebp

DEFAULT_BUCKET_ID:  GRAPHICS_DRIVER_TDR_FAULT

CUSTOMER_CRASH_COUNT:  1

BUGCHECK_STR:  0x116

PROCESS_NAME:  System

CURRENT_IRQL:  0

STACK_TEXT:  
8a8e6b74 90dd207b 00000116 849d7348 9084df20 nt!KeBugCheckEx+0x1e
8a8e6b98 90dc6937 9084df20 00000000 0000000d dxgkrnl!TdrBugcheckOnTimeout+0x8d
8a8e6bbc 9080692c 00000000 00000102 873fa008 dxgkrnl!TdrIsRecoveryRequired+0xb8
8a8e6c34 90830944 fffffcfb 0021a7b1 00000000 dxgmms1!VidSchiReportHwHang+0x3c0
8a8e6c5c 90831065 00000000 00000000 00000000 dxgmms1!VidSchiCheckHwProgress+0x68
8a8e6c98 9080d8f0 8a8e6c90 84b59f08 87cba480 dxgmms1!VidSchiWaitForSchedulerEvents+0x1b1
8a8e6d28 908323c9 873fa008 82a8abb9 873fa008 dxgmms1!VidSchiScheduleCommandToRun+0xaa
8a8e6d3c 90832485 873fa008 00000000 8752d658 dxgmms1!VidSchiRun_PriorityTable+0xf
8a8e6d50 82c5e07a 873fa008 94e6612e 00000000 dxgmms1!VidSchiWorkerThread+0x7f
8a8e6d90 82b04819 90832406 873fa008 00000000 nt!PspSystemThreadStartup+0x9e
00000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x19


STACK_COMMAND:  .bugcheck ; kb

FOLLOWUP_IP: 
igdkmd32+11f20
9084df20 55              push    ebp

SYMBOL_NAME:  igdkmd32+11f20

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: igdkmd32

IMAGE_NAME:  igdkmd32.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4aba7471

FAILURE_BUCKET_ID:  0x116_IMAGE_igdkmd32.sys

BUCKET_ID:  0x116_IMAGE_igdkmd32.sys

Followup: MachineOwner
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0: kd> lmvm igdkmd32
start    end        module name
9083c000 90d45000   igdkmd32 T (no symbols)           
    Loaded symbol image file: igdkmd32.sys
    Image path: \SystemRoot\system32\DRIVERS\igdkmd32.sys
    Image name: igdkmd32.sys
    Timestamp:        Thu Sep 24 00:48:09 2009 (4ABA7471)
    CheckSum:         004A45D4
    ImageSize:        00509000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4