Approx. start date
Apr 27, 2019
Operating System
  • Windows 10
  • List of current issues
    Windows 10 Laptop shows a BlueScreen (c000021a) and turns off.
    On 27th; I tried Steps 1 to 4 before turning on and logging into Windows
    On 28th; BSOD on first boot, then turned off. Turned on correctly on second attempt.
    On 29th; BSOD on first boot, then turned off. Turned on correctly on second attempt.

    Event Viewer:
    - Windows stopped working
    - Windows failed to start because of missing system files
    - Shut down unexpectedly
    Steps taken, but unsuccessful?
    1. Windows Automatic Repair - No fix
    2. Troubleshoot CMD > CHKDSK /F /R - No fix
    3. Troubleshoot CMD > SFC /SCANNOW - No fix
    4. Troubleshoot > Uninstall latest quality update - Temp fix?
    5. Updated Windows Defender Antivirus

    Spawn

    Administrator
    Verified
    Staff member
    First noticed this issue on the 27th April 2019.
    Windows 10 BSOD Error c000021a - Windows Stopped Working / Unexpected Shut down
    Problem Event Name: BlueScreen​
    Code: c000021a​
    OS Version: 10.0.17763.2.0.0.256.48​

    Power Options > Fast start-up is turned off.
    Windows Updates > Update History > Last quality update installed (KB4493509) on 23rd April 2019

    • 27th April 2019 - View tech. details does not state the missing system files.
    212959


    • 28th April 2019
    212960


    • 29th April 2019 (Today)
    212961





    Status: Not yet solved
     

    LASER_oneXM

    Level 34
    Verified
    the sysnative board is providing BSOD analysis (guided by moderators only) using several tools that are providing (much more)
    detailed informatons about the crash/system. They also are prividing customized scrips to resolve the problem.
    The guys has already helped me out several times (had several problems with BSOD, windows-update and driver problems)

     

    Spawn

    Administrator
    Verified
    Staff member
    Edit: Laptop booted up fine, no BSOD today.
    Which one?
    SanDisk SD6SF1M128G
    If you use Marcrium Reflect, it has an option to fix startup. Have had to use it a few times. Have you started up your computer three times in a row to trigger advanced boot options?
    I no longer use Macrium Reflect, only Windows Backup.
    @Spawn Have you tried using BlueScreenView or WhoCrashed to try and find the cause of the BSOD?
    I'll take a look at them, thank you.
     

    ticklemefeet

    Level 22
    Verified
    The movie I posted above helped a bunch with your same problem. That error is caused one of two system files or third party software.
     

    Vasudev

    Level 29
    Verified
    Edit: Laptop booted up fine, no BSOD today.

    SanDisk SD6SF1M128G

    I no longer use Macrium Reflect, only Windows Backup.

    I'll take a look at them, thank you.
    I remember seeing some BSODs on some Intel Rapid storage driver changelogs. You can upgrade to latest 17.2.x and older ones are deprecated now.
     
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    Spawn

    Administrator
    Verified
    Staff member
    Last edited:

    Vasudev

    Level 29
    Verified
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