BSOD BCCode 50 problem pls help to debug

my new system has windows 7 ultimate 64 bit i am facing BSOD BCCode 50 problem pls help to debug ..
core i3
intel mother board
4GB ram

i have attached my dump files ..
pls help me
TY

BSODs seemed to be cause by a Norton software, you should completely reinstall it or remove it

Code:

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

PAGE_FAULT_IN_NONPAGED_AREA (50)
Invalid system memory was referenced.  This cannot be protected by try-except,
it must be protected by a Probe.  Typically the address is just plain bad or it
is pointing at freed memory.
Arguments:
Arg1: ffffea8003b95c80, memory referenced.
Arg2: 0000000000000001, value 0 = read operation, 1 = write operation.
Arg3: fffff80002ade00c, If non-zero, the instruction address which referenced the bad memory
    address.
Arg4: 0000000000000007, (reserved)

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


Could not read faulting driver name

WRITE_ADDRESS: GetPointerFromAddress: unable to read from fffff80002d0f0e0
 ffffea8003b95c80 

FAULTING_IP: 
nt!ObfDereferenceObject+2c
fffff800`02ade00c f0480fc11f      lock xadd qword ptr [rdi],rbx

MM_INTERNAL_CODE:  7

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x50

PROCESS_NAME:  LUCOMS~1.EXE

CURRENT_IRQL:  0

TRAP_FRAME:  fffff88007410980 -- (.trap 0xfffff88007410980)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=0000000000000000 rbx=0000000000000000 rcx=ffffea8003b95cb0
rdx=0000000000000084 rsi=0000000000000000 rdi=0000000000000000
rip=fffff80002ade00c rsp=fffff88007410b10 rbp=fffff88007410c60
 r8=fffff78000000008  r9=0000000000000001 r10=fffffa8003716501
r11=fffff80002c51e80 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0         nv up ei ng nz na po nc
nt!ObfDereferenceObject+0x2c:
fffff800`02ade00c f0480fc11f      lock xadd qword ptr [rdi],rbx ds:5cb0:00000000`00000000=????????????????
Resetting default scope

LAST_CONTROL_TRANSFER:  from fffff80002b56b19 to fffff80002ad8f00

STACK_TEXT:  
fffff880`07410818 fffff800`02b56b19 : 00000000`00000050 ffffea80`03b95c80 00000000`00000001 fffff880`07410980 : nt!KeBugCheckEx
fffff880`07410820 fffff800`02ad6fee : 00000000`00000001 ffffffff`ffffffff 00000000`00000000 00000000`00000001 : nt! ?? ::FNODOBFM::`string'+0x40edb
fffff880`07410980 fffff800`02ade00c : 00000000`00000001 00000000`00000000 00000000`026fd398 00000000`74822450 : nt!KiPageFault+0x16e
fffff880`07410b10 fffff800`02dd0acc : fffff880`07410c60 ffffea80`03b95cb0 fffff880`07410bb8 00000000`00000001 : nt!ObfDereferenceObject+0x2c
fffff880`07410b70 fffff800`02ad8153 : fffffa80`03b7eb60 00000000`00000000 fffff880`07410bb8 fffffa80`03b95cb0 : nt!NtWaitForSingleObject+0xcc
fffff880`07410be0 00000000`74822dd9 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`023af0f8 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x74822dd9


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt! ?? ::FNODOBFM::`string'+40edb
fffff800`02b56b19 cc              int     3

SYMBOL_STACK_INDEX:  1

SYMBOL_NAME:  nt! ?? ::FNODOBFM::`string'+40edb

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4a5bc600

FAILURE_BUCKET_ID:  X64_0x50_nt!_??_::FNODOBFM::_string_+40edb

BUCKET_ID:  X64_0x50_nt!_??_::FNODOBFM::_string_+40edb

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

thanks .. i will uninstall it n try..

hi.
i got same problem after uninstalling Norton AV, i ran memtest no problems detected.
i hv attached new dump files . pls help me out
thanks