Windows 10: BSOD error 0xc000021a crash

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  1.    17 Nov 2015 #1

    BSOD error 0xc000021a crash


    This morning, I needed to check my emails so tried booting up my laptop only for the BSOD saying "Your PC ran into a problem and needs to restart. We are just collecting some error info and then we will restart for you." I allow it to reach 100% but whenever it starts to restart my laptop just freezes. No matter how many times I boot my computer this always seem to happen which is why I am unable to follow the BSOD posting instructions. Is there anyway I can fix this as I need certain data that is on my hard drive?
      My ComputerSystem Spec


  2. Posts : 12,518
    Windows 10 Pro
       17 Nov 2015 #2




    BSOD error 0xc000021a crash Diagnostics Test BSOD error 0xc000021a crash
     HDD TEST

    Run SeaTools to check the integrity of your HDD. http://www.sevenforums.com/tutorials...s-how-use.html

    Note   Note
    Do not run SeaTools on an SSD as the results will be invalid.


    Run chkdsk http://www.sevenforums.com/tutorials...isk-check.html
      My ComputersSystem Spec

  3.    17 Nov 2015 #3

    axe0 said: View Post


    BSOD error 0xc000021a crash Diagnostics Test BSOD error 0xc000021a crash
     HDD TEST

    Run SeaTools to check the integrity of your HDD. http://www.sevenforums.com/tutorials...s-how-use.html

    Note   Note
    Do not run SeaTools on an SSD as the results will be invalid.


    Run chkdsk http://www.sevenforums.com/tutorials...isk-check.html
    But if I can not actually load Windows at all at the moment should I just skip running SeaTools?
      My ComputerSystem Spec

  4.    17 Nov 2015 #4

    Geerey7 said: View Post
    But if I can not actually load Windows at all at the moment should I just skip running SeaTools?
    Never mind I didn't read the entirety of the post

    *EDIT*
    Now I have read other sections of the post on SeaTools it sounds like I would need another PC to download the software which I am not able to access until the weekend.
      My ComputerSystem Spec


  5. Posts : 12,518
    Windows 10 Pro
       17 Nov 2015 #5

    You could start with chkdsk already and hope it gives some result
    I would recommend to run "chkdsk /r" (without quotes) in case chkdsk finds something it could fix it.
      My ComputersSystem Spec

  6.    18 Nov 2015 #6

    axe0 said: View Post
    You could start with chkdsk already and hope it gives some result
    I would recommend to run "chkdsk /r" (without quotes) in case chkdsk finds something it could fix it.
    Right so I did what you suggested and it appears that it seems to have got stuck at a specific point however annoyingly neither my phone or iPad want to upload the photo I took so:
    "X:\windows\system32>chkdsk C: /R
    The type of the file system is NTFS.
    Volume label is Windows10_OS.

    Stage 1: Examining basic file system structure...
    840192 file records processed.
    File verification complete.
    9361 large file records processed.
    0 bad file records processed.

    Stage 2: Examining file name linkage...
    1068850 index entries processed.
    Index verification completed.
    0 unindexed files scanned.
    0 unindexed files recovered to lost and found.

    Stage 3: Examining security descriptors...
    Security descriptor verification completed.
    114330 data files processed.
    CHKDSK is verifying Usn Journal...
    16232 USN bytes processed.
    Usn Journal verification completed.

    Stage 4: Looking for bad clusters in user file data...
    Progress: 211575 of 840176 done; Stage: 25%; Total: 18%; ETA: 3:53:32"

    Like I said, it has now been at this point for over 12 hours now.
      My ComputerSystem Spec


  7. Posts : 12,518
    Windows 10 Pro
       18 Nov 2015 #7

    Please keep chkdsk running, it may take some time depending on how much it has to do and the size of the hard drive.
    warning   Warning
    Aborting chkdsk could cause damage
      My ComputersSystem Spec

  8.    18 Nov 2015 #8

    axe0 said: View Post
    Please keep chkdsk running, it may take some time depending on how much it has to do and the size of the hard drive.
    warning   Warning
    Aborting chkdsk could cause damage
    Chkdsk has just finished so:

    "X:\windows\system32>chkdsk C: /R
    The type of the file system is NTFS.
    Volume label is Windows10_OS.

    Stage 1: Examining basic file system structure...
    840192 file records processed.
    File verification complete.
    9361 large file records processed.
    0 bad file records processed.

    Stage 2: Examining file name linkage...
    1068850 index entries processed.
    Index verification completed.
    0 unindexed files scanned.
    0 unindexed files recovered to lost and found.

    Stage 3: Examining security descriptors...
    Security descriptor verification completed.
    114330 data files processed.
    CHKDSK is verifying Usn Journal...
    16232 USN bytes processed.
    Usn Journal verification completed.

    Stage 4: Looking for bad clusters in user file data...
    840176 files processed.
    File data verification completed.

    Stage 5: Looking for bad, free clusters...
    102123574 free clusters processed.
    Free space verification complete.

    Windows has scanned the file system and found no problems.
    No further action is required."

    This seems to imply there is nothing wrong however at the end it did fail to transfer logged messages to the event log with status 50.
      My ComputerSystem Spec


  9. Posts : 12,518
    Windows 10 Pro
       18 Nov 2015 #9

    This is just 1 step of finding the cause, there are a few usual causes for this crash.
    • Mismatched system files,
    • User-mode driver
    • system service
    • 3rd party app's


    To proceed, you would need recovery media or the troubleshooting options.
    I would recommend the recovery media in case the recovery partition(s) get damaged.
    Recovery Drive - Create in Windows 10 - Windows 10 Forums
      My ComputersSystem Spec

  10.    18 Nov 2015 #10

    But if I can not load Windows and just continuously get the BSOD or the troubleshooting screen I won't be able to create the recovery drive, will I?
      My ComputerSystem Spec


 
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