Explorer.exe crashes, error 0xc0000005

Hi all, hope you can help. My computer has recently started to crash explorer.exe and I don't know why. I am not too technically minded so reading a dump file means nothing to me. I have attached a copy of the latest dump file if it helps.

*******************************************************************************
* *
* Exception Analysis *
* *
*******************************************************************************

*** ERROR: Symbol file could not be found. Defaulted to export symbols for KERNELBASE.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for kernel32.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for ieframe.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for shell32.dll -
*** ERROR: Module load completed but symbols could not be loaded for explorer.exe
*** ERROR: Symbol file could not be found. Defaulted to export symbols for duser.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for msvcrt.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for msiltcfg.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for ehSSO.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for AltTab.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for FXSST.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for GdiPlus.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for msvcr71.dll -

FAULTING_IP:
ole32!GetChannelCallMgr+63
7660ad65 ff11 call dword ptr [ecx]

EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 7660ad65 (ole32!GetChannelCallMgr+0x00000063)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000000
Parameter[1]: 082565ac
Attempt to read from address 082565ac

PROCESS_NAME: explorer.exe

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

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

EXCEPTION_PARAMETER1: 00000000

EXCEPTION_PARAMETER2: 082565ac

READ_ADDRESS: 082565ac

FOLLOWUP_IP:
ole32!GetChannelCallMgr+0
7660ad31 6a14 push 14h

MOD_LIST: <ANALYSIS/>

NTGLOBALFLAG: 0

APPLICATION_VERIFIER_FLAGS: 0

LAST_CONTROL_TRANSFER: from 7660ad0c to 7660ad65

ADDITIONAL_DEBUG_TEXT: Followup set based on attribute [Is_ChosenCrashFollowupThread] from Frame:[0] on thread:[PSEUDO_THREAD]

FAULTING_THREAD: ffffffff

BUGCHECK_STR: APPLICATION_FAULT_INVALID_POINTER_READ_CALL

PRIMARY_PROBLEM_CLASS: INVALID_POINTER_READ_CALL

DEFAULT_BUCKET_ID: INVALID_POINTER_READ_CALL

STACK_TEXT:
04c3f76c 7660ad65 ole32!GetChannelCallMgr+0x63
04c3f7b4 7660ad0c ole32!AsyncStubInvoke+0x68
04c3f804 7660dda6 ole32!StubInvoke+0x82
04c3f854 76528a43 ole32!CCtxComChnl::ContextInvoke+0xfa
04c3f930 76528938 ole32!MTAInvoke+0x1a
04c3f94c 7660a44c ole32!AppInvoke+0xab
04c3f97c 7660db41 ole32!ComInvokeWithLockAndIPID+0x372
04c3fa5c 7660a45c ole32!ThreadInvoke+0x302
04c3faa8 7666063c rpcrt4!DispatchToStubInCNoAvrf+0x4a
04c3fae4 766607ca rpcrt4!RPC_INTERFACE:ispatchToStubWorker+0x16c
04c3fb3c 766606b6 rpcrt4!RPC_INTERFACE:ispatchToStub+0x8b
04c3fb64 766622ce rpcrt4!RPC_INTERFACE:ispatchToStubWithObject+0xb2
04c3fb9c 76660bfa rpcrt4!LRPC_SCALL:ispatchRequest+0x23b
04c3fbe8 76660ac6 rpcrt4!LRPC_SCALL::QueueOrDispatchCall+0xbd
04c3fc08 76660a85 rpcrt4!LRPC_SCALL::HandleRequest+0x34f
04c3fc24 76660921 rpcrt4!LRPC_SASSOCIATION::HandleRequest+0x144
04c3fc58 76660895 rpcrt4!LRPC_ADDRESS::HandleRequest+0xbd
04c3fc90 7665fe85 rpcrt4!LRPC_ADDRESS::ProcessIO+0x50a
04c3fd0c 7665fd1d rpcrt4!LrpcServerIoHandler+0x16
04c3fd18 7665fc6a rpcrt4!LrpcIoComplete+0x16
04c3fd28 77791d63 ntdll!TppAlpcpExecuteCallback+0x1c5
04c3fd50 777915b0 ntdll!TppWorkerThread+0x5a4
04c3feb8 76c6ed6c kernel32!BaseThreadInitThunk+0x12
04c3fec4 777c377b ntdll!__RtlUserThreadStart+0x70
04c3ff04 777c374e ntdll!_RtlUserThreadStart+0x1b


STACK_COMMAND: .cxr 04C3F488 ; kb ; dt ntdll!LdrpLastDllInitializer BaseDllName ; dt ntdll!LdrpFailureData ; dds 4c3f76c ; kb

SYMBOL_NAME: ole32!GetChannelCallMgr+0

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: ole32

IMAGE_NAME: ole32.dll

DEBUG_FLR_IMAGE_TIMESTAMP: 4ce7b96f

FAILURE_BUCKET_ID: INVALID_POINTER_READ_CALL_c0000005_ole32.dll!GetChannelCallMgr

BUCKET_ID: APPLICATION_FAULT_INVALID_POINTER_READ_CALL_ole32!GetChannelCallMgr+0

WATSON_IBUCKET: -1876629596

WATSON_IBUCKETTABLE: 1

WATSON_STAGEONE_URL: http://watson.microsoft.com/StageOne...htm?Retriage=1

Followup: MachineOwner

Thanks Mitchell65 for a reply. I bought the copy of Win 7 Ultimate from Amazon, full package, boxed item. I have been toying with the idea of re-installing as the 64bit version that also came in the box, but I have so much software to reload, i have been a little hesitant. Being self employed, I can't have the computer down for too long.

hmm..interesting. I did buy my copy from pre-order Sold by: Amazon EU S.a.r.L. ordered on the 18th Aug 2009 and dispatched on the 20th Oct 2009 when Microsoft first released Win 7. What do you recommend?

Done...here you go

Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->

Validation Code: 0
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-FKHB4-8RQ7M-MBRTB
Windows Product Key Hash: RBwaqRVQl8Rsb7VnBCZl8KIh1fM=
Windows Product ID: 00426-292-3521721-85816
Windows Product ID Type: 5
Windows License Type: Retail
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {B56327CC-D9FB-4216-AD95-515DA6C576B6}(1)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Ultimate
Architecture: 0x00000000
Build lab: 7601.win7sp1_gdr.130104-1431
TTS Error:
Validation Diagnostic:
Resolution Status: N/A

Vista WgaER Data-->
ThreatID(s): N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002

Windows XP Notifications Data-->
Cached Result: N/A, hr = 0x80070002
File Exists: No
Version: N/A, hr = 0x80070002
WgaTray.exe Signed By: N/A, hr = 0x80070002
WgaLogon.dll Signed By: N/A, hr = 0x80070002

OGA Notifications Data-->
Cached Result: N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
OGAExec.exe Signed By: N/A, hr = 0x80070002
OGAAddin.dll Signed By: N/A, hr = 0x80070002

OGA Data-->
Office Status: 109 N/A
OGA Version: N/A, 0x80070002
Signed By: N/A, hr = 0x80070002
Office Diagnostics: 025D1FF3-364-80041010_025D1FF3-229-80041010_025D1FF3-230-1_025D1FF3-517-80040154_025D1FF3-237-80040154_025D1FF3-238-2_025D1FF3-244-80070002_025D1FF3-258-3

Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)
Default Browser: C:\Program Files\Google\Chrome\Application\chrome.exe
Download signed ActiveX controls: Prompt
Download unsigned ActiveX controls: Disabled
Run ActiveX controls and plug-ins: Allowed
Initialize and script ActiveX controls not marked as safe: Disabled
Allow scripting of Internet Explorer Webbrowser control: Disabled
Active scripting: Allowed
Script ActiveX controls marked as safe for scripting: Allowed

File Scan Data-->

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{B56327CC-D9FB-4216-AD95-515DA6C576B6}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-MBRTB</PKey><PID>00426-292-3521721-85816</PID><PIDType>5</PIDType><SID>S-1-5-21-3451958395-2058545944-3382048276</SID><SYSTEM><Manufacturer>To Be Filled By O.E.M.</Manufacturer><Model>To Be Filled By O.E.M.</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>P1.50</Version><SMBIOSVersion major="2" minor="5"/><Date>20120516000000.000000+000</Date></BIOS><HWID>323B3007018400F8</HWID><UserLCID>0809</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>GMT Standard Time(GMT+00:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM/><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>

Spsys.log Content: 0x80070002

Licensing Data-->
Software licensing service version: 6.1.7601.17514

Name: Windows(R) 7, Ultimate edition
Description: Windows Operating System - Windows(R) 7, RETAIL channel
Activation ID: ac96e1a8-6cc4-4310-a4ff-332ce77fb5b8
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00426-00170-292-352172-00-2057-7600.0000-1572010
Installation ID: 010152489526256431844203013406283792503034550275540353
Processor Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88338
Machine Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88339
Use License URL: http://go.microsoft.com/fwlink/?LinkID=88341
Product Key Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88340
Partial Product Key: MBRTB
License Status: Licensed
Remaining Windows rearm count: 4
Trusted time: 01/03/2013 15:08:33

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 12:1:2012 22:31
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: NgAAAAIABAABAAEAAAADAAAAAQABAAEA6GEmUdBatiOqdkjkauA0SB60PBL+GiISvX4urExY

OEM Activation 1.0 Data-->
N/A

OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes, but no SLIC table
Windows marker version: N/A
OEMID and OEMTableID Consistent: N/A
BIOS Information:
ACPI Table Name OEMID Value OEMTableID Value
APIC 051612 APIC1649
FACP A_M_I OEMFACP
MCFG 051612 OEMMCFG
OEMB 051612 OEMB1649
AAFT 051612 OEMAAFT
GSCI 051612 GMCHSCI

Cheers Golden. Can't remember the last time I had a BSOD albeit months not years ago since the last time. I will follow the steps on the BSOD post though and post the results as soon as I can.

regards,

rtda

Back again Golden,
I have sorted out the .dmp files, downloaded and run the SF Diagnostic tool the results of which are attached.

regards,

rtda