Random BSOD Caused by win32k.sys


  1. Posts : 3
    Win 7 64 bit
       #1

    Random BSOD Caused by win32k.sys


    Hi.

    I hope you can help, This BSOD appeared to have started after installing APC software to manage my UPS. I have since uninstalled this software, and have ensured that no services are running.

    BSOD Error: SYSTEM_SERVICE_EXCEPTION

    I have attached a copy of the minidump.

    This is the first time I have attempted to analyse a minidump, and I would attach the symnbols, but the folder is 44.5 meg in size...

    I receive the BSOD at what appears random occurances. sometimes the PC will be on for a few days, and no BSOD. Sometimes it will BSOD overnight when not in use (idle), or during the day (idle), or while I am internet browsing, or playing games. reviewing the muiltiple dumps, I receive the same info as below.

    I have not yet performed a memtest
    chkdsk came back with no errors
    sfc /scannow also came back with no errors

    According to the bugcheck analysys:

    Code:
    Probably caused by : win32k.sys ( win32k!NtUserEnumDisplayDevices+8b )
    Then when using !analyze -v
    Code:
    EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.
    
    FAULTING_IP: 
    win32k!NtUserEnumDisplayDevices+8b
    fffff960`001943d3 488b5278        mov     rdx,qword ptr [rdx+78h]
    
    CUSTOMER_CRASH_COUNT:  1
    
    DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT
    
    BUGCHECK_STR:  0x3B
    
    PROCESS_NAME:  winlogon.exe
    
    CURRENT_IRQL:  0
    
    ANALYSIS_VERSION: 6.3.9600.17336 (debuggers(dbg).150226-1500) amd64fre
    
    LAST_CONTROL_TRANSFER:  from fffff80003881ed3 to fffff960001943d3
    
    STACK_TEXT:  
    fffff880`0a8e3a90 fffff800`03881ed3 : fffffa80`23a0b7c0 fffff880`0a8e3b60 00000000`00000000 00000000`00000020 : win32k!NtUserEnumDisplayDevices+0x8b
    fffff880`0a8e3ae0 00000000`7747a49a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
    00000000`0029ea38 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x7747a49a
    
    
    FOLLOWUP_IP: 
    win32k!NtUserEnumDisplayDevices+8b
    fffff960`001943d3 488b5278        mov     rdx,qword ptr [rdx+78h]
    
    SYMBOL_STACK_INDEX:  0
    
    SYMBOL_NAME:  win32k!NtUserEnumDisplayDevices+8b
    
    FOLLOWUP_NAME:  MachineOwner
    
    MODULE_NAME: win32k
    
    IMAGE_NAME:  win32k.sys
    
    DEBUG_FLR_IMAGE_TIMESTAMP:  56422d98
    
    IMAGE_VERSION:  6.1.7601.19061
    
    STACK_COMMAND:  .cxr 0xfffff8800a8e30b0 ; kb
    
    FAILURE_BUCKET_ID:  X64_0x3B_win32k!NtUserEnumDisplayDevices+8b
    
    BUCKET_ID:  X64_0x3B_win32k!NtUserEnumDisplayDevices+8b
    
    ANALYSIS_SOURCE:  KM
    
    FAILURE_ID_HASH_STRING:  km:x64_0x3b_win32k!ntuserenumdisplaydevices+8b
    
    FAILURE_ID_HASH:  {06d313b2-f313-e69a-dae3-f52edc77d0cd}
    I can provide output of lmnt if required.
    I hope you can help! Thank you!!
      My Computer


  2. Posts : 3
    Win 7 64 bit
    Thread Starter
       #2

    Memtest is now running.
    Runtime 23 mins, pass 1 of 4, 59%, test 7. Zero errors - using default autostarted configs.

    I will supply update of memtest results in about 19 hours after i get home from work. Ill monitor this thread throughout the day.

    Thanks!
      My Computer


  3. Posts : 3
    Win 7 64 bit
    Thread Starter
       #3

    Memtest completed 4 passes.
    Zero errors
    1 note: RAM may be vulnerable to high frequency row hammer bit flips.

    So, anybody know what i can do to resolve my BSOD issue?
      My Computer


  4. Posts : 7,050
    Windows 10 Pro
       #4
      My Computer


 

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