Windows 8 and 8.1 Forums


0xc000021a error at boot Win 8.1 Pro wmc x64

  1. #1


    Posts : 4
    Win 8.1 PRO WMC x64 & Win 7 Ultimate x64

    0xc000021a error at boot Win 8.1 Pro wmc x64


    Hey guys I keep getting the following BSOD 0xc000021a error at boot on Win 8.1 Pro wmc x64. I cannot log on to windows, as I have computer background, I have tried to diagnose it myself but unfortunately I am at a dead end and need help. The only way I can gain access is by running Win 8.1 with driver signature enforcement disabled at start-up.

    My computer is Vaio VPCCB15fa Win 8.1 pro x64 and Win 7 ult. x64 dual boot.

      My System SpecsSystem Spec

  2. #2


    Posts : 4
    Win 8.1 PRO WMC x64 & Win 7 Ultimate x64


    I have run the dm log collector but the zip file it outputs is insanely small, well here it is.
      My System SpecsSystem Spec

  3. #3


    Posts : 4
    Win 8.1 PRO WMC x64 & Win 7 Ultimate x64


    Here are my mini-dumps since the BSOD started.
      My System SpecsSystem Spec

  4. #4


    Code:
    2: kd> .bugcheck
    Bugcheck code C000021A
    Arguments ffffc000`b1e696a0 ffffffff`c0000428 00000000`00000000 00000022`248a05e0
    
    2: kd> k
    Child-SP          RetAddr           Call Site
    ffffd001`1f37c6b8 fffff800`4ffaa991 nt!KeBugCheckEx
    ffffd001`1f37c6c0 fffff800`4ffa44ea nt!PopGracefulShutdown+0x2c9
    ffffd001`1f37c700 fffff800`4fd7b1b3 nt!NtSetSystemPowerState+0x269a
    ffffd001`1f37c840 fffff800`4fd73600 nt!KiSystemServiceCopyEnd+0x13
    ffffd001`1f37c9d8 fffff800`501c01b3 nt!KiServiceLinkage
    ffffd001`1f37c9e0 fffff800`500f3a27 nt!PopIssueActionRequest+0x73f43
    ffffd001`1f37caa0 fffff800`4fcccb8e nt!PopPolicyWorkerAction+0x63
    ffffd001`1f37cb10 fffff800`4fcca3ac nt!PopPolicyWorkerThread+0xba
    ffffd001`1f37cb50 fffff800`4fcf7280 nt!ExpWorkerThread+0x28c
    ffffd001`1f37cc00 fffff800`4fd75fc6 nt!PspSystemThreadStartup+0x58
    ffffd001`1f37cc60 00000000`00000000 nt!KiStartSystemThread+0x16
    
    2: kd> !error ffffffffc0000428
    Error code: (NTSTATUS) 0xc0000428 (3221226536) - Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.
    It's difficult to say what the actual cause is, given this bugcheck is pretty much undocumented. It's a user mode crash of the windows logon process, this makes it difficult to debug. The best way to debug this is to attach a Kernel debugger to the system and go through the boot process. Now, the digital signature for this file cannot vbe verifiered, meaning either you or some malicious software has tampered with it. Now the question is, what file is corrupt, to find out we need to attach a debugger to the system.
      My System SpecsSystem Spec

  5. #5


    Posts : 4
    Win 8.1 PRO WMC x64 & Win 7 Ultimate x64


    Is it guaranteed that we'll find the problem through the debugging process? Otherwise it might just be easier for me to format the 8.1 partition and start over. Tomorrow I can try and debug it. But after Wednesday I need a healthy system as I need to start my final grad project for Arch. school, definitely can't have any problems with that!
      My System SpecsSystem Spec

  6. #6


    It isn't guaranteed, no. It should help, either way, a reinstall/system repair is probably the best option in this case.
    Especially if it's in dire need of use for work.
      My System SpecsSystem Spec

0xc000021a error at boot Win 8.1 Pro wmc x64
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