1. Joined : Nov 2016
    Posts : 2
    Windows 10 1607
       2 Weeks Ago #1

    BSOD after upgrading 7/8/10 to Windows 10 V1607 => 0xc000021a


    I am upgrading some machines, most go without a hitch but some have a mysterious BSOD.

    I attached the dumps of a Windows 8 machine, i use MDT to upgrade to Windows 10 v1607 + do windows updates. BSOD happens after the first real boot (which means upgrade + updates have been done)

    GHUM-L-E82PHJ12-Thu_11_24_2016_173811_42.zip

    Already tried swapping the disk in a very simular machine (same model, different bios) but the problem follows the disk.

    Anyone who can help me or point me in the right direction?

    EDIT: Something i forgot, these systems still boot in Safe mode! Tried cleanboot but no luck.
    Last edited by stainomo; 2 Weeks Ago at 16:41.
      My System SpecsSystem Spec


  2. Joined : Nov 2015
    Posts : 1,713
    64bit Win 10 Pro ver 1607 Build 14393.447
       2 Weeks Ago #2

    Hello and welcome to TenForums

    The error seems to be related to a problem with the session manager initialisation.

    Code:
    WINLOGON_FATAL_ERROR (c000021a)
    The Winlogon process terminated unexpectedly.
    Arguments:
    Arg1: ffffde8e0026d0b0, String that identifies the problem.
    Arg2: 00000000c0000022, Error Code.
    
    2: kd> da ffffde8e0026d0b0
    ffffde8e`0026d0b0  "Session Manager Initialization"
    
    If you can boot into safe mode please try to run the system file checker and repair the system files. It might also be worth running a disk check with repair as well.

    http://www.tenforums.com/tutorials/2895-sfc-command-run-windows-10-a.html

    Drive Error Checking in Windows 10
      My System SpecsSystem Spec


  3. Joined : Nov 2016
    Posts : 2
    Windows 10 1607
       2 Weeks Ago #3

    Thanks for the welcome! long time lurker, first time poster.

    Als did some Windbg work and found this but no clue what it means.

    Yesterday i started a sfc scan but it finished without repairing anything, this morning i started a complete scandiks. Just finished but it did not find any errors. PC still not booting like it should

    Just started the Rollback, i'd greatly appreciate it if anyone could help me
      My System SpecsSystem Spec


  4. Joined : Nov 2015
    Posts : 1,713
    64bit Win 10 Pro ver 1607 Build 14393.447
       1 Week Ago #4

    Are there any differences in the BIOS settings for the laptops and PC which end up not booting? I am thinking of things like legacy versus UEFI boot or possibly the way the disk mode is set (AHCI or IDE).
      My System SpecsSystem Spec


 


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