Code:
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* *
* Bugcheck Analysis *
* *
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Use !analyze -v to get detailed debugging information.
BugCheck 34, {50853, fffff8800397e508, fffff8800397dd60, fffff80002ca80e1}
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption ( nt!MmUnmapViewInSystemCache+d1 )
Followup: MachineOwner
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2: kd> !analyze -v
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* *
* Bugcheck Analysis *
* *
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CACHE_MANAGER (34)
See the comment for FAT_FILE_SYSTEM (0x23)
...........
SYMBOL_STACK_INDEX: 0
SYMBOL_NAME: nt!MmUnmapViewInSystemCache+d1
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: nt
DEBUG_FLR_IMAGE_TIMESTAMP: 4fa390f3
STACK_COMMAND: .cxr 0xfffff8800397dd60 ; kb
IMAGE_NAME: memory_corruption
FAILURE_BUCKET_ID: X64_0x34_nt!MmUnmapViewInSystemCache+d1
BUCKET_ID: X64_0x34_nt!MmUnmapViewInSystemCache+d1
Followup: MachineOwner
---------
it could be 
make sure you do what Kaktussoft told you (memtest86+) to check the condition of your RAM
Code:
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
Use !analyze -v to get detailed debugging information.
BugCheck 3B, {c0000005, fffff8800185015c, fffff8800b970b80, 0}
*** ERROR: Symbol file could not be found. Defaulted to export symbols for win32k.sys -
Probably caused by : fltmgr.sys ( fltmgr!TreeInsert+40 )
Followup: MachineOwner
---------
fltmgr.sys is Microsoft Filesystem Filter Manager
you may want to run chkdsk /f /r from the command prompt and see if it find any errors
also run sfc /scannow to search for any corrupted file system, since win32k.sys seems corrupting your pool:
Code:
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
Use !analyze -v to get detailed debugging information.
BugCheck 19, {3, fffff8a004e9ebb0, fffff8a004e1ebb0, fffff8a004e9ebb0}
*** ERROR: Symbol file could not be found. Defaulted to export symbols for win32k.sys -
Probably caused by : Pool_Corruption ( nt!ExDeferredFreePool+cbb )
Followup: Pool_corruption
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0: kd> !analyze -v
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* *
* Bugcheck Analysis *
* *
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BAD_POOL_HEADER (19)
The pool is already corrupt at the time of the current request.
This may or may not be due to the caller.
The internal pool links must be walked to figure out a possible cause of
the problem, and then special pool applied to the suspect tags or the driver
verifier to a suspect driver.
Quote