Você recebe a Verificação de erros 0x9F: DRIVER_POWER_STATE_FAILURE . Quando eu olho para o dmp, vejo que o driver nVIDIA GPU para o nvlddmkm.sys Geforece 840M parece causar:
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DRIVER_POWER_STATE_FAILURE (9f)
A driver has failed to complete a power IRP within a specific time.
Arguments:
Arg1: 0000000000000003, A device object has been blocking an Irp for too long a time
Arg2: ffffe000ac7e3540, Physical Device Object of the stack
Arg3: fffff803205ad960, nt!TRIAGE_9F_POWER on Win7 and higher, otherwise the Functional Device Object of the stack
Arg4: ffffe000ad6761c0, The blocked IRP
Debugging Details:
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DRVPOWERSTATE_SUBCODE: 3
DRIVER_OBJECT: ffffe000abdde060
IMAGE_NAME: pci.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 53d0f1d4
MODULE_NAME: pci
FAULTING_MODULE: fffff801f0b5c000 pci
CUSTOMER_CRASH_COUNT: 1
DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT
BUGCHECK_STR: 0x9F
PROCESS_NAME: System
STACK_TEXT:
nt!KeBugCheckEx
nt!PopIrpWatchdogBugcheck
nt!PopIrpWatchdog
nt!KiRetireDpcList
nt!KiIdleLoop
FAILURE_ID_HASH_STRING: km:0x9f_3_image_pci.sys
0: kd> !irp ffffe000ad6761c0
Irp is active with 6 stacks 4 is current (= 0xffffe000ad676368)
No Mdl: No System Buffer: Thread 00000000: Irp stack trace.
cmd flg cl Device File Completion-Context
[ 0, 0] 0 0 00000000 00000000 00000000-00000000
Args: 00000000 00000000 00000000 00000000
[ 0, 0] 0 0 00000000 00000000 00000000-00000000
Args: 00000000 00000000 00000000 00000000
[ 0, 0] 0 0 00000000 00000000 00000000-00000000
Args: 00000000 00000000 00000000 00000000
>[ 16, 2] 0 e1 ffffe000ac7e3540 00000000 fffff801f1c6837c-ffffd000c41e28f0 Success Error Cancel pending
\Driver\pci dxgkrnl!DpiFdoPowerCompletionRoutine
Args: 00000000 00000001 00000001 00000000
[ 16, 2] 0 e1 ffffe000ad9b11f0 00000000 fffff8031eb3df4c-ffffe000ae39aed8 Success Error Cancel pending
\Driver\nvlddmkm nt!PopRequestCompletion
Args: 00000000 00000001 00000001 00000000
[ 0, 0] 0 0 00000000 00000000 00000000-ffffe000ae39aed8
Args: 00000000 00000000 00000000 00000000
!DevObj !DrvObj !DevExt ObjectName
ffffe000ad9b11f0 Unable to load image \SystemRoot\system32\DRIVERS\nvlddmkm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
\Driver\nvlddmkm ffffe000ad9b1340 InfoMask field not found for _OBJECT_HEADER at ffffe000ad9b11c0
> ffffe000ac7e30b0 \Driver\ACPI ffffe000ac6b9bf0
ffffe000ac7e3540 \Driver\pci ffffe000ac7e3690 Cannot read info offset from nt!ObpInfoMaskToOffset
!DevNode ffffe000ac7d5700 :
DeviceInst is "PCI\VEN_10DE&DEV_1341&SUBSYS_15DD1043&REV_A2&1f8cb5be&0&00E4"
ServiceName is "nvlddmkm"
Loaded symbol image file: nvlddmkm.sys
Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys
Image name: nvlddmkm.sys
Timestamp: Wed Nov 12 21:51:31 2014 (5463C853)
Tente atualizar o driver e veja se isso o corrige.