BSOD c000021a intermittent crashes

Crashing regularly since Xmas, usually with C000021a error message but sometimes just dies to black and sometimes to minimised blue screen. Tried uninstalling any recently loaded progs including antivirus but still same issues. might work for 30 mins and then next time not even complete loading OS.

System is a Dell studio 1557
with Windows 7 Home edition, 64 bit version OEM.
Managed to download and run BSOD memory Dump utility and Zip of report included.
Currently managing to run chdsk but any help gratefully received.

Code:

Loading Dump File [C:\Users\Mike\Downloads\BSODDmpFiles\robzibob\Windows_NT6_BSOD_jcgriff2\012012-26582-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*c:\users\mike\documents\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.17640.amd64fre.win7sp1_gdr.110622-1506
Machine Name:
Kernel base = 0xfffff800`02264000 PsLoadedModuleList = 0xfffff800`024a9670
Debug session time: Fri Jan 20 13:28:29.268 2012 (UTC - 7:00)
System Uptime: 0 days 0:00:18.768
Loading Kernel Symbols
...............................................................
.................................................
Loading User Symbols
Loading unloaded module list
.....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck C000021A, {fffff8a00013b2a0, c0000189, 0, 0}

Probably caused by : ntkrnlmp.exe ( nt!ExpSystemErrorHandler2+5e1 )

Followup: MachineOwner
---------

3: kd> !analyze -v
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*                        Bugcheck Analysis                                    *
*                                                                             *
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WINLOGON_FATAL_ERROR (c000021a)
The Winlogon process terminated unexpectedly.
Arguments:
Arg1: fffff8a00013b2a0, String that identifies the problem.
Arg2: 00000000c0000189, Error Code.
Arg3: 0000000000000000
Arg4: 0000000000000000

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


ERROR_CODE: (NTSTATUS) 0xc000021a - {Fatal System Error}  The %hs system process terminated unexpectedly with a status of 0x%08x (0x%08x 0x%08x).  The system has been shut down.

EXCEPTION_CODE: (NTSTATUS) 0xc000021a - {Fatal System Error}  The %hs system process terminated unexpectedly with a status of 0x%08x (0x%08x 0x%08x).  The system has been shut down.

EXCEPTION_PARAMETER1:  fffff8a00013b2a0

EXCEPTION_PARAMETER2:  00000000c0000189

EXCEPTION_PARAMETER3:  0000000000000000

EXCEPTION_PARAMETER4: 0

ADDITIONAL_DEBUG_TEXT:  Session Manager Initialization

BUGCHECK_STR:  0xc000021a_smss.exe_c0000189

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

PROCESS_NAME:  smss.exe

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from fffff8000273d63e to fffff800022e0c40

STACK_TEXT:  
fffff880`009b74e8 fffff800`0273d63e : 00000000`0000004c 00000000`c000021a fffff880`009b7608 fffffa80`058cf820 : nt!KeBugCheckEx
fffff880`009b74f0 fffff800`0252a2c1 : fffffa80`05965886 fffff880`009b7ca0 00000000`00000100 fffffa80`05aec150 : nt!PoShutdownBugCheck+0xae
fffff880`009b7570 fffff800`0232d74d : 00000000`00000000 00000000`00000004 00000000`00000000 00000000`0018f801 : nt!ExpSystemErrorHandler2+0x5e1
fffff880`009b77a0 fffff800`027102a1 : 00000000`c000021a 00000000`00000004 00000000`00000001 fffff880`009b7b58 : nt!ExpSystemErrorHandler+0xdd
fffff880`009b77e0 fffff800`02712023 : 00000000`c000021a fffffa80`00000004 fffff8a0`00000001 fffff880`009b7b58 : nt!ExpRaiseHardError+0xe1
fffff880`009b7b10 fffff800`022dfed3 : fffffa80`052acb60 00000000`00000001 00000000`0018f838 fffff800`025d84f4 : nt!NtRaiseHardError+0x1a1
fffff880`009b7bb0 00000000`7757264a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`0018f818 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x7757264a


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt!ExpSystemErrorHandler2+5e1
fffff800`0252a2c1 cc              int     3

SYMBOL_STACK_INDEX:  2

SYMBOL_NAME:  nt!ExpSystemErrorHandler2+5e1

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4e02aaa3

FAILURE_BUCKET_ID:  X64_0xc000021a_smss.exe_c0000189_nt!ExpSystemErrorHandler2+5e1

BUCKET_ID:  X64_0xc000021a_smss.exe_c0000189_nt!ExpSystemErrorHandler2+5e1

Followup: MachineOwner
---------

Loading Dump File [C:\Users\Mike\Downloads\BSODDmpFiles\robzibob\Windows_NT6_BSOD_jcgriff2\012012-26504-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*c:\users\mike\documents\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.17640.amd64fre.win7sp1_gdr.110622-1506
Machine Name:
Kernel base = 0xfffff800`02e14000 PsLoadedModuleList = 0xfffff800`03059670
Debug session time: Fri Jan 20 13:16:28.026 2012 (UTC - 7:00)
System Uptime: 0 days 0:07:44.056
Loading Kernel Symbols
...............................................................
................................................................
...............................
Loading User Symbols
Loading unloaded module list
....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck A, {32, d, 0, fffff800034104ca}

Probably caused by : ntkrnlmp.exe ( nt!KiPageFault+260 )

Followup: MachineOwner
---------

0: kd> !analyze -v
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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

IRQL_NOT_LESS_OR_EQUAL (a)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high.  This is usually
caused by drivers using improper addresses.
If a kernel debugger is available get the stack backtrace.
Arguments:
Arg1: 0000000000000032, memory referenced
Arg2: 000000000000000d, IRQL
Arg3: 0000000000000000, bitfield :
	bit 0 : value 0 = read operation, 1 = write operation
	bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status)
Arg4: fffff800034104ca, address which referenced memory

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


READ_ADDRESS: GetPointerFromAddress: unable to read from fffff800030c3100
 0000000000000032 

CURRENT_IRQL:  d

FAULTING_IP: 
hal!HalpSendFlatIpi+5b
fffff800`034104ca 0fb60c08        movzx   ecx,byte ptr [rax+rcx]

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0xA

PROCESS_NAME:  System

TRAP_FRAME:  fffff80000b9c8d0 -- (.trap 0xfffff80000b9c8d0)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000032
rdx=0000000000000832 rsi=0000000000000000 rdi=0000000000000000
rip=fffff800034104ca rsp=fffff80000b9ca60 rbp=fffff800034269b0
 r8=0004000000000000  r9=fffbffffffffffff r10=0000000000000018
r11=fffff80000b9cb00 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0         nv up di pl nz na po nc
hal!HalpSendFlatIpi+0x5b:
fffff800`034104ca 0fb60c08        movzx   ecx,byte ptr [rax+rcx] ds:cf7b:00000000`00000032=??
Resetting default scope

LAST_CONTROL_TRANSFER:  from fffff80002e901e9 to fffff80002e90c40

STACK_TEXT:  
fffff800`00b9c788 fffff800`02e901e9 : 00000000`0000000a 00000000`00000032 00000000`0000000d 00000000`00000000 : nt!KeBugCheckEx
fffff800`00b9c790 fffff800`02e8ee60 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000064 : nt!KiBugCheckDispatch+0x69
fffff800`00b9c8d0 fffff800`034104ca : 00000005`00000000 00000001`00000000 00000000`0000718e fffff800`02e9b497 : nt!KiPageFault+0x260
fffff800`00b9ca60 fffff800`0341057e : fffff780`00000320 00000000`000008d1 00000000`00000000 fffff780`00000320 : hal!HalpSendFlatIpi+0x5b
fffff800`00b9ca90 fffff800`02e9b39a : 00000000`00000000 fffff800`03006e80 00000000`00000000 00000000`00000000 : hal!HalpRequestIpiSpecifyVector+0x6d
fffff800`00b9cac0 fffff800`03407895 : fffff800`0342d460 fffff800`00b9cc70 fffff800`0342d460 00000000`00000000 : nt!KeUpdateSystemTime+0x27a
fffff800`00b9cbc0 fffff800`02e8d173 : fffff800`03006e80 fffff800`00b9cc70 fffff800`030098c0 00000000`00000004 : hal!HalpHpetClockInterrupt+0x8d
fffff800`00b9cbf0 fffff800`02e88942 : fffff800`03006e80 fffff800`00000001 00000000`00000001 fffff800`00000000 : nt!KiInterruptDispatchNoLock+0x163
fffff800`00b9cd80 00000000`00000000 : fffff800`00b9d000 fffff800`00b97000 fffff800`00b9cd40 00000000`00000000 : nt!KiIdleLoop+0x32


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt!KiPageFault+260
fffff800`02e8ee60 440f20c0        mov     rax,cr8

SYMBOL_STACK_INDEX:  2

SYMBOL_NAME:  nt!KiPageFault+260

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4e02aaa3

FAILURE_BUCKET_ID:  X64_0xA_nt!KiPageFault+260

BUCKET_ID:  X64_0xA_nt!KiPageFault+260

Followup: MachineOwner
---------

Loading Dump File [C:\Users\Mike\Downloads\BSODDmpFiles\robzibob\Windows_NT6_BSOD_jcgriff2\011912-25927-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*c:\users\mike\documents\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.17640.amd64fre.win7sp1_gdr.110622-1506
Machine Name:
Kernel base = 0xfffff800`02e4a000 PsLoadedModuleList = 0xfffff800`0308f670
Debug session time: Wed Jan 18 15:07:11.462 2012 (UTC - 7:00)
System Uptime: 0 days 0:04:13.492
Loading Kernel Symbols
...............................................................
................................................................
...............................
Loading User Symbols
Loading unloaded module list
....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 3B, {c0000005, fffff880010e3c11, fffff8800906fba0, 0}

Probably caused by : fltmgr.sys ( fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291 )

Followup: MachineOwner
---------

0: kd> !analyze -v
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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

SYSTEM_SERVICE_EXCEPTION (3b)
An exception happened while executing a system service routine.
Arguments:
Arg1: 00000000c0000005, Exception code that caused the bugcheck
Arg2: fffff880010e3c11, Address of the instruction which caused the bugcheck
Arg3: fffff8800906fba0, Address of the context record for the exception that caused the bugcheck
Arg4: 0000000000000000, zero.

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


EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.

FAULTING_IP: 
fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291
fffff880`010e3c11 c3              ret

CONTEXT:  fffff8800906fba0 -- (.cxr 0xfffff8800906fba0)
rax=0000000000000000 rbx=fffffa8003fccc60 rcx=0000000000000000
rdx=0000000000000000 rsi=fffffa8004c39010 rdi=fffffa8004acd890
rip=fffff880010e3c11 rsp=fffff88009070588 rbp=0000000000000000
 r8=0000000000000000  r9=00000000000003e0 r10=fffff80002e4a000
r11=fffff88009070560 r12=fffffa8003df2070 r13=fffffa8003df2070
r14=fffffa8003fccfb8 r15=fffffa8004acd890
iopl=0         nv up ei ng nz na po nc
cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00010286
fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+0x291:
fffff880`010e3c11 c3              ret
Resetting default scope

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x3B

PROCESS_NAME:  SearchIndexer.

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 0000000000000000 to fffff880010e3c11

STACK_TEXT:  
fffff880`09070588 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+0x291


FOLLOWUP_IP: 
fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291
fffff880`010e3c11 c3              ret

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: fltmgr

IMAGE_NAME:  fltmgr.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4ce7929c

STACK_COMMAND:  .cxr 0xfffff8800906fba0 ; kb

FAILURE_BUCKET_ID:  X64_0x3B_fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291

BUCKET_ID:  X64_0x3B_fltmgr!FltpLegacyProcessingAfterPreCallbacksCompleted+291

Followup: MachineOwner
---------

If you are overclocking anything, please stop.

1. Possible causes are hard disk errors... Corrupted system files... Viruses
2. Possible causes are Memory problems... Corrupted hard disk system files... Corrupted System Files... Lack of Windows updates... Antivirus Software...
3. Possible causes are Memory problems... Corrupted hard disk system files... Corrupted System Files... Graphics Driver...

Thanks to Dave76 for help understanding possible causes.

• Run Disk Check with both boxes checked for all HDDs and with Automatically fix file system errors checked for all SSDs. Post back your logs for the checks after finding them using Check Disk (chkdsk) - Read Event Viewer Log
  
  
  
• Run SFC /SCANNOW Command - System File Checker up to three times to fix all errors. Post back if it continues to show errors after the third run or if the first run comes back with no integrity violations.
  
  
  
• Check for viruses.
  
  Download and install the free version of Malwarebytes : Free anti-malware, anti-virus and spyware removal download (do not start the trial) and make sure it is updated. Do not run a scan yet.
  Download VIPRE Rescue - VIPRE Computer Recovery Solution from Sunbelt Software but do not unzip it yet
  Download the Fakerean removal tool but do not run it yet.
  Start your computer in Safe Mode
  Unzip VIPRE Rescue and let it run.
  Run a full scan with Malwarebytes.
  Run the fakerean removal tool.

Proceed with the following steps only if stability has not improved.

• Run the boot version of Memtest86+ paying close attention to Parts 2 and 3 of the tutorial. Also, in case Memtest86+ misses anything and comes up with no errors, run the extended version of the Windows Memory Diagnostics Tool for at least five passes. These you may want to run overnight since they take a long time to complete (run them an hour before bed each of the next two nights and check before going to sleep that they are still running).
  
  
  
• Install all Windows Updates.
  
  
  
• Remove AVG using the AVG Remover and replace with Microsoft Security Essentials - Free Antivirus for Windows to run with Windows firewall.
  
  
  
• Re-install your graphics card driver using the following steps.
  
  1. Download the latest drivers for your display card(s)
  2. Click Start Menu
  3. Right Click My Computer/Computer
  4. Click Manage
  5. Click Device Manager from the list on the left
  6. Expand Display adapters
  7. Do the following for each adapter (in case you have multiple display cards)
     
     • Right click the adapter
     • Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
     • Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
  8. Restart your computer after uninstalling drivers for all display cards
  9. Install the latest driver for the display cards once Windows starts
  
  
  Alternatively:
  
  1. Login as an adminstrative user
  2. Download the latest drivers for your display card(s)
  3. Click Start Menu
  4. Click Control Panel
  5. Click Hardware and Sound
  6. Click Device Manager (the last link under Devices and Printers)
  7. Expand Display adapters
  8. Do the following for each adapter (in case you have multiple display cards)
     
     • Right click the adapter
     • Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
     • Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
  9. Restart your computer after uninstalling drivers for all display cards
  10. Install the latest driver for the display cards once Windows starts

Disk check completed and reported that there was now no errors but unfortunately the boot will no longer complete and I'm getting blue screen death again almost instantly. Thanks for all the suggestions and, provided I can get it to boot properly, I'll try to get through some and report back.
Last thought for now: any chance a BIOS update would be neccessary. i.e. outdated version causing this?
I ask as it is one of the comments on the blue screen and I managed to download a latest version from Dell before it died again but it's not installed yet.
Thanks again Writhziden

Tried Last good configuration, restoring to System prior to Xmas when all seemed fine, boot is getting less and less reliable. i.e. In about fifteen attempts so far today, only two have allowed me in to try make any changes. These were:
1. Ran AVG installer - failed to complete
2. Uninstalled display drivers which it picked up but crashed on restart before managing on second attempt.
3. Ran Scannow but black screen after about 58% of the verification phase.

As it's an OEM, I don't have a Windows 7 disc to reliably boot from and the repair disc I made doesn't seem to work or at least Boot any better than from the hard drive.

Any more suggestions chaps?

Have you been able to run the disk checks? If not, do them through the Repair Your Computer selection in the Advanced Boot Menu. You can go into your command prompt and run them as follows:

chkdsk /r c:
chkdsk /r d:
chkdsk /r e:
chkdsk /r f:

For all drives that exist on the machine. You may get that drives do not exist after d:, but you should repeat any of the drives that come back saying that Windows has made corrections until it says no problems were found.

The system hasn't stayed up long enough to complete even the verification section of the System Files check of Scannow. There is only one drive, C.
The chkdsk completed and indicated that there no longer any (It must have found some) errors.
That said, it has currently been working for nearly two hours as it completes the Malwarebytes scan (18 found so far) having already finished Vipre. (It didn't give any feedback as to anything found btw.)
I'll certainly try scannow again now that it seems more stable but then we've been here before.

Spoke too soon! Turned round having posted that last message to find it re-booting and failing (twice) before getting fatal error blue screen again.
bts1

Any luck with the system security forums?