Windows 10: How to fix 0xc000021a, BSOD? Solved

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  1.    12 Feb 2017 #1

    How to fix 0xc000021a, BSOD?


    Initially(in Oct2016), I used regback registry to fix USBPCap USB not working problem . After sometime It gave 0xc000021a BSOD . So i used Windows 10 iso to repair and maybe* messed it up with bootrec and bcdedit commands. Tried SFC and dism but no integrity voilations. I am able to boot PC ONLY by disabling driver signature enforcement(which stays till restart due to fastboot). I remember I had deleted some OEM*.inf before bootrec. Incidents may not be related. Minidump on debugging show ntkrnlmp.exe to be the problem. Please help. Even safe mode doesn't work. I don't want to reset since my PC is highly customized desktop environment. Giving all details to be clear. Tried many methods in this forum. Please help. Older dumps:Old1, Old2.
    MemTest+ Result Image.
    Can't add picture directly[Adding does nothing].
    Also
    Code:
    bootrec /scanos
    gives Total identified Windows installations: 0
    Last edited by Anutrix; 14 Feb 2017 at 02:21. Reason: bootrec result
      My ComputerSystem Spec


  2. Posts : 13,312
    Windows 10 Pro
       12 Feb 2017 #2




    How to fix 0xc000021a, BSOD? Diagnostic Test How to fix 0xc000021a, BSOD?
     RAM TEST

    Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 10 Forums

    Note   Note


    MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.


    Make a photo of the result and post it.

    Addition:
    If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
    If errors show up and you see them a lot later, no problem, the errors don't affect the test.
      My ComputersSystem Spec

  3.    14 Feb 2017 #3

    I looked over it. Memtest is definitely the way to go. I see different RAM Modules with different speed. The cause can be incompatibility too:

    Code:
    [Memory Device (Type 17) - Length 34 - Handle 0043h]
      Size                          2048MB
      Device Locator                ChannelA-DIMM0
      Bank Locator                  BANK 0
      Speed                         1600MHz
      Manufacturer                  0467
      Part Number                   RMR5070ME76F8F1600
    [Memory Device (Type 17) - Length 34 - Handle 0047h]
      Size                          8192MB
      Device Locator                ChannelB-DIMM0
      Bank Locator                  BANK 2
      Speed                         1333MHz
      Manufacturer                  Kingston
      Part Number                   KHX1866C10D3/8G
      My ComputerSystem Spec

  4.    14 Feb 2017 #4

    BSODHunter said: View Post
    I looked over it. Memtest is definitely the way to go. I see different RAM Modules with different speed. The cause can be incompatibility too:

    Code:
    [Memory Device (Type 17) - Length 34 - Handle 0043h]
      Size                          2048MB
      Device Locator                ChannelA-DIMM0
      Bank Locator                  BANK 0
      Speed                         1600MHz
      Manufacturer                  0467
      Part Number                   RMR5070ME76F8F1600
    [Memory Device (Type 17) - Length 34 - Handle 0047h]
      Size                          8192MB
      Device Locator                ChannelB-DIMM0
      Bank Locator                  BANK 2
      Speed                         1333MHz
      Manufacturer                  Kingston
      Part Number                   KHX1866C10D3/8G
    BSOD started long after i added ram.
    Besides both ram gives same BSOD with single or any combination.
      My ComputerSystem Spec


  5. Posts : 13,312
    Windows 10 Pro
       14 Feb 2017 #5

    Does other RAM give this BSOD too?
      My ComputersSystem Spec

  6.    14 Feb 2017 #6

    axe0 said: View Post
    Does other RAM give this BSOD too?
    2GB Stock RAM alone[don't know why] does not let PC turn on alone[no response only CPU light is on].
    2GB+8GB and 8GB+2GB RAM runs at 1600Mhz and gives BSOD.
    8GB alone also gives same BSOD.
    I'm nearly sure its not RAM as disabling driver signature enforcement boots the PC and live OSs like Ubuntu,Remix OS, Debian, Macrium Reflect and many others work perfectly.
    Just weird many programs and features have install date 10/18/16 when actually I had them installed long time back.I don't remember exactly but that was that I may* have installed anniversary update.
    Attachment 121123
    Please help. Have this issue since October. Also is there a way to check when I installed anniversary update?

    Thx Axe0.
    Finally a forums site which has quick responders.
      My ComputerSystem Spec


  7. Posts : 13,312
    Windows 10 Pro
       14 Feb 2017 #7

    There are different reasons why a system may not boot with 2GB, but I'm not a guy that can troubleshoot that kind of a problem.

    Currently I would suggest to try a different set of RAM to test if the 8GB stick really isn't causing issues, just as a confirmation of your thought.

    AFAIK, whenever a software update gets installed, 'installed on' gets updated. I don't know why, but it's what I see on my systems.

    Windows Update History - View in Windows 10
      My ComputersSystem Spec

  •    14 Feb 2017 #8

    axe0 said: View Post
    There are different reasons why a system may not boot with 2GB, but I'm not a guy that can troubleshoot that kind of a problem.

    Currently I would suggest to try a different set of RAM to test if the 8GB stick really isn't causing issues, just as a confirmation of your thought.

    AFAIK, whenever a software update gets installed, 'installed on' gets updated. I don't know why, but it's what I see on my systems.

    Windows Update History - View in Windows 10
    I don't have spare RAMs and can't afford to buy one anytime soon.
    Those screenshots are from 2015. Updates are no longer categorized in Windows Update History. Also somehow[I cleaned up C:\ drive recently] update history older than a week are not present.
    Can someone tell something using the minidumps?
      My ComputerSystem Spec


  • Posts : 13,312
    Windows 10 Pro
       14 Feb 2017 #9

    Could you borrow from a neighbor?

    The dumps don't show that kind of information
      My ComputersSystem Spec

  •    14 Feb 2017 #10

    axe0 said: View Post
    Could you borrow from a neighbor?

    The dumps don't show that kind of information
    I'm really really sorry.
    Most Indians are paranoid(No Offense) about their things. So no one is going to lend me RAM.
    Just removing CPU cover is surgery for people here.
    Thx anyways.
      My ComputerSystem Spec


  •  
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