System goes to boot cycle with STOP code c000021a at the time of boot after performing restore using System Recovery Disk (SRD).

Problem

System goes to boot cycle with STOP code c000021a at the time of boot after performing restore using System Recovery Disk (SRD).

"autochk program not found - skipping AUTOCHECK" is shown when booting after restore. (Figure 1)

Figure 1


A few seconds later, STOP error occurs, and then system goes to boot cycle. (Figure 2)

Figure 2

Error Message

STOP: c000021a {Fatal System Error}
The Session Manager Initialization system process terminated unexpectedly with a status of 0xc000003a (0x00000000 0x00000000).
The system has been shut down.
 

Solution

WORKAROUND:

Please recover Windows 2008 R2 under uEFI environment following the steps below.

  1. After completing the recovery, click "Analyze", and click "Open Commad Shell Window" on SRD. (Figure 3)

    Figure 3

     
  2. Run "regedit".
     
  3. Highlight "HKEY_LOCAL_MACHINE" and click on "File" & "Load hive".
     
  4. Browse to "C:\Windows\System32\Config" folder and select "System" hive file.
     
  5. Input the key name as "Test" and click "OK".
     
  6. Ensute that the following registry value is set to 1.
    HKEY_LOCAL_MACHINE\Test\Select\Current
     
  7. Expand the following registry key.
    HKEY_LOCAL_MACHINE\Test\ControlSet001\Services\mountmgr
     
  8. Change the value of "NoAutoMount" from 1 to 0.
     
  9. Close the Registry Editor, and click "Exit". Reboot the server.
     
  10. After rebooting, open the Registry Editor and change the following value from 0 to 1.
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mountmgr\NoAutoMount
     
  11. Close the Registry Editor.

     

Refer this article to troubleshoot further
http://blogs.technet.com/b/askcore/archive/2011/08/09/operating-system-comes-up-with-blue-screen-error-stop-c000021a.aspx



 


Applies To

This would occur when the following system configurations are met:

  • Windows Server 2008 R2
  • uEFI
  • The following registry values is set to 1.
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mountmgr\NoAutoMount

Notes: The above registry does not exist by default and is created when performing a command "automount disable" on diskpart or a command "mountvol /N".

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