Hello ritadesai, Welcome to SF
First off if your OCing in anyway stop, return everything to stock settings for the purposes of testing
If you havent already, fill in your system specs so we know what we are dealing with
http://www.sevenforums.com/tutorials/180324-system-info-see-your-system-specs.html
Make sure you have read the guide on asking for help with BSOD so you know what we need
http://www.sevenforums.com/crashes-debugging/96879-blue-screen-death-bsod-posting-instructions.html
Run some scans to check against virus or infection
Anti-rootkit utility TDSSKiller
http://www.sevenforums.com/tutorials/166445-windows-defender-offline.html
OK so i ran the four dumps you uploaded and they are all identical
error code 0x50 page fault in non paged area
BSOD Index and all dumps blame the driver ntoskrnl.exe which is not a driver but the kernel on which a driver has crashed so not much use to us
Code:
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
Use !analyze -v to get detailed debugging information.
BugCheck 50, {ffffffffffffffd0, 1, fffff80002e9712c, 0}
Could not read faulting driver name
Probably caused by : win32k.sys ( win32k!xxxCreateDesktopEx+8e2 )
Followup: MachineOwner
---------
2: kd> !analyze -v
*******************************************************************************
* *
* 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: ffffffffffffffd0, memory referenced.
Arg2: 0000000000000001, value 0 = read operation, 1 = write operation.
Arg3: fffff80002e9712c, If non-zero, the instruction address which referenced the bad memory
address.
Arg4: 0000000000000000, (reserved)
Debugging Details:
------------------
Could not read faulting driver name
WRITE_ADDRESS: GetPointerFromAddress: unable to read from fffff800030bd100
GetUlongFromAddress: unable to read from fffff800030bd1c0
ffffffffffffffd0
FAULTING_IP:
nt!ObfDereferenceObject+2c
fffff800`02e9712c f0480fc11f lock xadd qword ptr [rdi],rbx
MM_INTERNAL_CODE: 0
CUSTOMER_CRASH_COUNT: 1
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
BUGCHECK_STR: 0x50
PROCESS_NAME: winlogon.exe
CURRENT_IRQL: 0
TRAP_FRAME: fffff88002cfe2b0 -- (.trap 0xfffff88002cfe2b0)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffff900c01f2010 rbx=0000000000000000 rcx=0000000000000000
rdx=0000000000000002 rsi=0000000000000000 rdi=0000000000000000
rip=fffff80002e9712c rsp=fffff88002cfe440 rbp=fffff880073c8ca0
r8=fffff80002e0f000 r9=0000000000000000 r10=0000000000000001
r11=fffffa8003b0ca12 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0 nv up ei ng nz na po nc
nt!ObfDereferenceObject+0x2c:
fffff800`02e9712c f0480fc11f lock xadd qword ptr [rdi],rbx ds:00000000`00000000=????????????????
Resetting default scope
LAST_CONTROL_TRANSFER: from fffff80002e35eec to fffff80002e8dfc0
STACK_TEXT:
fffff880`02cfe148 fffff800`02e35eec : 00000000`00000050 ffffffff`ffffffd0 00000000`00000001 fffff880`02cfe2b0 : nt!KeBugCheckEx
fffff880`02cfe150 fffff800`02e8c0ee : 00000000`00000001 ffffffff`ffffffd0 00000000`00000000 ffffffff`ffffffff : nt! ?? ::FNODOBFM::`string'+0x4514f
fffff880`02cfe2b0 fffff800`02e9712c : fffffa80`03b71f60 00000000`00000000 fffff900`c01f2010 00000000`00000001 : nt!KiPageFault+0x16e
fffff880`02cfe440 fffff960`0011a042 : fffff880`073c8ca0 00000000`00000000 fffffa80`07acaf20 fffffa80`07f32c58 : nt!ObfDereferenceObject+0x2c
fffff880`02cfe4a0 fffff960`001341a3 : 00000000`00000000 00000000`00000001 00000000`00000000 00000000`00000000 : win32k!xxxCreateDesktopEx+0x8e2
fffff880`02cfe640 fffff960`0013269c : 00000000`00000000 fffff880`073c8ca0 fffff900`c01f2010 00000000`00000000 : win32k!xxxResolveDesktop+0xa47
fffff880`02cfe9f0 fffff960`0015e99f : 00000000`77b7a020 00000000`00000000 00000000`00000001 fffffa80`07ee6b30 : win32k!xxxCreateThreadInfo+0x648
fffff880`02cfeb60 fffff960`00135c00 : fffff900`c01f2010 fffffa80`07f6db50 fffffa80`07f6db50 fffffa80`07ee6b30 : win32k!UserThreadCallout+0xcf
fffff880`02cfeb90 fffff800`0312d0a5 : fffffa80`07f6db50 fffffa80`07ee6b30 fffff6fc`40039e10 fffff6fc`40039e40 : win32k!W32pThreadCallout+0x78
fffff880`02cfebc0 fffff800`02e858ba : fffffa80`07f6db50 ffffffff`ffff0000 00000000`00000020 000007fe`fe880000 : nt!PsConvertToGuiThread+0xe9
fffff880`02cfebf0 fffff800`02e8d41f : 00000000`000000bb 00000000`00dff138 000007fe`fe880000 00000000`00dff158 : nt!KiConvertToGuiThread+0xa
fffff880`02cfec20 00000000`7781d45a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceExit+0x1c4
00000000`00dff100 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x7781d45a
STACK_COMMAND: kb
FOLLOWUP_IP:
win32k!xxxCreateDesktopEx+8e2
fffff960`0011a042 49895d38 mov qword ptr [r13+38h],rbx
SYMBOL_STACK_INDEX: 4
SYMBOL_NAME: win32k!xxxCreateDesktopEx+8e2
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: win32k
IMAGE_NAME: win32k.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 50ad9b54
FAILURE_BUCKET_ID: X64_0x50_win32k!xxxCreateDesktopEx+8e2
BUCKET_ID: X64_0x50_win32k!xxxCreateDesktopEx+8e2
Followup: MachineOwner
---------
At this point i would suggest running some hardware tests to check for any problems so we can start to narrow it down
RAM
http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html
HDD
Hard Drive Diagnostic Procedure
General
http://www.sevenforums.com/tutorials/100352-hardware-stress-test-prime95.html MAKE SURE YOU MONITOR TEMPS WHILE DOING THIS
If these come out ok then we need to start looking at drivers, looking at your loaded drivers list i can see you have a few old drivers in there that could do with updating (in order of importance/age)
CtClsFlt.sys 15/06/2009 Creative Camera Class Upper Filter Driver
HECIx64.sys 17/09/2009 Intel Management Engine ? Chipset
SynTP.sys 23/12/2009 Synaptics Touchpad Driver
Rt64win7.sys 12/01/2010 Realtek PCI-E Gigabit Ethernet
NETw5s64.sys 18/03/2010 Intel 5100 wifi
The top two in particular predate windows 7
If all else fails we can look at running driver verifier to track down an offending driver but i dont think we should go there just yet as it can be a pain in the arse
http://www.sevenforums.com/tutorials/101379-driver-verifier-enable-disable.html