ntoskrnl.exe problem

Post it following the Blue Screen of Death (BSOD) Posting Instructions.

Your crash dumps are not showing any finite probable cause.

Test your RAM modules for possible errors.
How to Test and Diagnose RAM Issues with Memtest86+
Run memtest for at least 8 passes, preferably overnight.

If memtest comes free of errors, enable Driver Verifier to monitor the drivers.
Driver Verifier - Enable and Disable
Run Driver Verifier for 24 hours or the occurrence of the next crash, whichever is earlier.

   Information

Why Driver Verifier:
It puts a stress on the drivers, ans so it makes the unstable drivers crash. Hopefully the driver that crashes is recorded in the memory dump.

How Can we know that DV is enabled:
It will make the system bit of slow, laggy.

   Warning

Before enabling DV, make it sure that you have earlier System restore points made in your computer. You can check it easily by using CCleaner looking at Tools > System Restore.

If there is no points, make a System Restore Point manually before enabling DV.

   Tip

• If you fail to get on the Desktop because of DV, Boot into Advanced Boot Options > Safe mode. Disable DV there. Now boot normally again, and try following the instruction of enabling DV again.
• If you cannot boot in Safe mode too, do a System Restore to a point you made earlier.

Let us know the results, with the subsequent crash dumps, if any. Post it following the Blue Screen of Death (BSOD) Posting Instructions.
__________________________________________________________________________________
BSOD ANALYSIS:

Code:

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

BugCheck 109, {a3a039d89c58b4ec, b3b7465eeed6f2ae, fffff80000b96bb0, 6}

*** WARNING: Unable to verify timestamp for ntoskrnl.exe
*** ERROR: Module load completed but symbols could not be loaded for ntoskrnl.exe
Probably caused by : ntoskrnl.exe ( nt_fffff80000b95000+1bb0 )

Followup: MachineOwner
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3: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

CRITICAL_STRUCTURE_CORRUPTION (109)
This bugcheck is generated when the kernel detects that critical kernel code or
data have been corrupted. There are generally three causes for a corruption:
1) A driver has inadvertently or deliberately modified critical kernel code
 or data. See http://www.microsoft.com/whdc/driver/kernel/64bitPatching.mspx
2) A developer attempted to set a normal kernel breakpoint using a kernel
 debugger that was not attached when the system was booted. Normal breakpoints,
 "bp", can only be set if the debugger is attached at boot time. Hardware
 breakpoints, "ba", can be set at any time.
3) A hardware corruption occurred, e.g. failing RAM holding kernel code or data.
Arguments:
Arg1: a3a039d89c58b4ec, Reserved
Arg2: b3b7465eeed6f2ae, Reserved
Arg3: fffff80000b96bb0, Failure type dependent information
Arg4: 0000000000000006, Type of corrupted region, can be
    0 : A generic data region
    1 : Modification of a function or .pdata
    2 : A processor IDT
    3 : A processor GDT
    4 : Type 1 process list corruption
    5 : Type 2 process list corruption
    6 : Debug routine modification
    7 : Critical MSR modification

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


FAULTING_IP: 
nt_fffff80000b95000+1bb0
fffff800`00b96bb0 48895c2408      mov     qword ptr [rsp+8],rbx

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT

BUGCHECK_STR:  0x109

PROCESS_NAME:  System

CURRENT_IRQL:  0

STACK_TEXT:  
fffff880`033a85d8 00000000`00000000 : 00000000`00000109 a3a039d8`9c58b4ec b3b7465e`eed6f2ae fffff800`00b96bb0 : nt!KeBugCheckEx


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt_fffff80000b95000+1bb0
fffff800`00b96bb0 48895c2408      mov     qword ptr [rsp+8],rbx

SYMBOL_NAME:  nt_fffff80000b95000+1bb0

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt_fffff80000b95000

IMAGE_NAME:  ntoskrnl.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  5149a99c

FAILURE_BUCKET_ID:  X64_0x109_6_nt_fffff80000b95000+1bb0

BUCKET_ID:  X64_0x109_6_nt_fffff80000b95000+1bb0

Followup: MachineOwner
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Have you took the memtest? If not, disable DV now and go for it.