Windows 7: BSOD Win7 x32

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 1A, {41284, 6850001, 64be, c0802000}

*** WARNING: Unable to verify timestamp for aswSP.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSP.SYS
Probably caused by : aswSP.SYS ( aswSP+9b82 )


MEMORY_MANAGEMENT (1a)
    # Any other values for parameter 1 must be individually examined.
Arguments:
Arg1: 00041284, A PTE or the working set list is corrupt.
Arg2: 06850001
Arg3: 000064be
Arg4: c0802000

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


BUGCHECK_STR:  0x1a_41284

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

PROCESS_NAME:  msnmsgr.exe

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 82ab4806 to 82b1ad10

STACK_TEXT:  
acf14794 82ab4806 0000001a 00041284 06850001 nt!KeBugCheckEx+0x1e
acf147bc 82ab4a58 c0c1b140 200fe867 c0034280 nt!MiLocateWsle+0xc1
acf147dc 82a6a4c3 06850000 a9a60220 000064be nt!MiTerminateWsle+0x1f
acf14c40 82af20aa c0034288 a9a60030 b4535260 nt!MiDecommitPages+0x164
acf14cd8 8c4e1b82 ffffffff 000cedb0 000cedc4 nt!NtFreeVirtualMemory+0x882
WARNING: Stack unwind information not available. Following frames may be wrong.
acf14d1c 82a8142a ffffffff 000cedb0 000cedc4 aswSP+0x9b82
acf14d1c 773b64f4 ffffffff 000cedb0 000cedc4 nt!KiFastCallEntry+0x12a
000ced84 00000000 00000000 00000000 00000000 0x773b64f4


STACK_COMMAND:  kb

FOLLOWUP_IP: 
aswSP+9b82
8c4e1b82 ??              ???

SYMBOL_STACK_INDEX:  5

SYMBOL_NAME:  aswSP+9b82

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: aswSP

IMAGE_NAME:  aswSP.SYS

DEBUG_FLR_IMAGE_TIMESTAMP:  4d65202b

FAILURE_BUCKET_ID:  0x1a_41284_aswSP+9b82

BUCKET_ID:  0x1a_41284_aswSP+9b82

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