Windows 10: BSOD during boot up, Bugcheck c000021a

Discus and support BSOD during boot up, Bugcheck c000021a in Windows 10 BSOD Crashes and Debugging to solve the problem; Hello everyone. If you want to know system specs of a laptop, you can take a look at my profile. Today, I got this laptop from a friend who told me... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by Dobroslav, Jul 9, 2017.

  1. Dobroslav Win User

    BSOD during boot up, Bugcheck c000021a


    Hello everyone.
    If you want to know system specs of a laptop, you can take a look at my profile.
    Today, I got this laptop from a friend who told me that it is running slowly. And it was actually extremely slow running. I was then searching for a potential problem when I realized that there is a "checking for updates" loop in Windows Update, which I was trying to solve.

    • First thing I've done was setting up a clean boot and eventually sfc /scannow in safe mode with command prompt. The result: corrupt files were fixed successfully. Restart
    • Now, another problem I'm facing now is BSOD during boot, error 0x000021a. The only way I can boot into fully-operating system is to go to advanced startup options and choose option number 7 - Disable driver signature enforcement.
    • After "normal" boot up, I ran a DISM checkhealth, scanhealth which told me that there were not any errors or corrupted files.
    • Because there is a problem with Windows update, I followed the steps from here and ran the .bat file, now I see the date when the last check of updates has been running but I haven't pressed the "check for updates" button yet.
    • I've tried to update drivers from Lenovo website but it seems that it doesn't resolve the problem. Although the computer runs pretty fast now, I think it is due to the fact that I'm working in a clean boot environment.
    • Lenovo Solution Center also can't execute the hardware scan, I just get the orange window with white exclamation mark, but without any text or reference.
    I would like to ask you to help me to figure out what is the actual problem. Before I removed the history of windows update I saw that one of the last installation was update of AMD graphics drivers, which was failed, so I think it could be the major problem here.
    I ran sfc /scannow again right now, I got the same result like the first time. Corrupt files, fixed with success.
    Thank you very much.

    :)
     
    Dobroslav, Jul 9, 2017
    #1
  2. LizzyE Win User

    Two graphic arts programs that worked in Windows 8 and 10, no longer work after Windows 10 Build 1607 64-bit update

    I tried the compatibility testing and they are both listed as incompatible products with no other error details. I am unable to install a previous build because it is past the time when that build was available. I also tried the available restore points
    but they failed due to what the SrtTrail log stated as a:

    Root cause found:

    ---------------------------

    Bugcheck c000021a. Parameters = 0xffffd385771c1900, 0xffffffffc0000428, 0x0, 0x17bb0d10000.

    Boot critical file is corrupt.
     
    LizzyE, Jul 9, 2017
    #2
  3. Windows 10 continously cycles around

    I am having trouble with my Window10 laptop,

    It keeps on reporting stop code of 0xC000021A failure.

    Automatic repair doesn't work. Reset the PC also doesn't work.

    When I look into the file C:/Windows/System32/Logfiles/SrtTrail.txt it says

    Startup Repair has tried several times but still cannot determine the cause of the problem

    Session Details

    System disk = /Device/Harddisk0

    Windows directory = C:/Windows

    AutoChk Run =

    Number of Root Causes = 1

    Also

    Test Performed

    ---------------------

    Name: Bugcheck analyis

    Result : Completed Successfully Error Code = 0x0

    Time Take = 593ms

    Root Cause found:

    ----------------------------

    Bugcheck c000021a. Parameters = 0xffffd000d82778d0, 0xffffffffc0000006, 0xffffd000d80d1470, 0x0.

    Boot critical file is corrupt.

    I have also tried to create a boot media however I am not able to get windows to run from the boot media as it seems as I am not able to re-install windows.
     
    MohamedsadiqMandan, Jul 9, 2017
    #3
  4. zbook New Member

    BSOD during boot up, Bugcheck c000021a

    Rule 4No piracy or discussion of piracy allowed at all. Such as software, music, videos and other intellectual property violations (e.g. downloading youtube videos locally etc) - it is forum policy that no help shall be given to people who knowingly steal software or services.One of the main reasons for this is that the act of pirating the software will inevitably change the working of the software and make investigation and repair impossible. Please install a legitimate copy of the software and if you are still experiencing the issue we will be please to assist - No further assistance will be provided until we are satisfied that the software is genuine.
     
    zbook, Jul 9, 2017
    #4
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BSOD during boot up, Bugcheck c000021a

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