Windows 7: First BSOD problem

Microsoft (R) Windows Debugger Version 6.11.0001.404 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\K\Desktop\040610-17921-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*F:\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7600 MP (2 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Machine Name:
Kernel base = 0xfffff800`0284b000 PsLoadedModuleList = 0xfffff800`02a88e50
Debug session time: Tue Apr  6 10:34:13.476 2010 (GMT-4)
System Uptime: 0 days 6:45:21.242
Loading Kernel Symbols
...............................................................
................................................................
.....................
Loading User Symbols
Loading unloaded module list
....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 3B, {c0000005, fffff8000288701e, fffff880074a3e20, 0}

Probably caused by : ntkrnlmp.exe ( nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26 )

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

1: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        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: fffff8000288701e, Address of the exception record for the exception that caused the bugcheck
Arg3: fffff880074a3e20, 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: 
nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26
fffff800`0288701e f00fba3100      lock btr dword ptr [rcx],0

CONTEXT:  fffff880074a3e20 -- (.cxr 0xfffff880074a3e20)
rax=fffffa8001b6a8d0 rbx=0000000000000000 rcx=0000000000000000
rdx=fffffa8001b6a8d0 rsi=00000000ffffffff rdi=fffffa8001b6a8d0
rip=fffff8000288701e rsp=fffff880074a4800 rbp=0000000000000001
 r8=0000000000000000  r9=0000000000000000 r10=00000000000026f4
r11=fffff880074a4850 r12=0000000000000000 r13=0000000000000001
r14=0000000000000000 r15=fffff900c2dfc9f0
iopl=0         nv up ei ng nz na pe nc
cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00010282
nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+0x26:
fffff800`0288701e f00fba3100      lock btr dword ptr [rcx],0 ds:002b:00000000`00000000=????????
Resetting default scope

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x3B

PROCESS_NAME:  Wow.exe

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 0000000000000000 to fffff8000288701e

STACK_TEXT:  
fffff880`074a4800 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+0x26


FOLLOWUP_IP: 
nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26
fffff800`0288701e f00fba3100      lock btr dword ptr [rcx],0

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4a5bc600

STACK_COMMAND:  .cxr 0xfffff880074a3e20 ; kb

FAILURE_BUCKET_ID:  X64_0x3B_nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26

BUCKET_ID:  X64_0x3B_nt!ExEnterCriticalRegionAndAcquireFastMutexUnsafe+26

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