Hi there,
This is the cause:
The STOP 0xC000021A error occurs when either Winlogon.exe or
Csrss.exe fails. When the Windows NT kernel detects that either of these
processes has stopped, it stops the system and raises the STOP
0xC000021A error. This error may have several causes. Among them are
the following:
If possible contact a local technician to the do the below,if you are not sure of this process.
and also ask him to take a backup of your registry keys and create a system restore point without fail.
To troubleshoot this problem, you must determine which of these processes failed and why.
To
determine which process failed, register Dr. Watson as the default
system debugger (if it is not already the default debugger). Dr.
Watson for Windows NT logs diagnostic information about process
failures to a log file (Drwtsn32.log). Also, you can configure this
program to produce memory dump files of failed processes that you can
analyze in a debugger to determine why a process fails.
To set up Dr. Watson to trap user-mode program errors, follow these steps:
It is very common for certain types of remote
control software to replace the default Windows GINA DLL
(Msgina.dll). Therefore, a good first step is to examine the system
to see if it has a third-party GINA DLL. To do this, locate the
following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
This command configures Dr. Watson as the default system debugger.
Create crash dump
Visual Notification
If Dr. Watson
did not create a User.dmp file for either Winlogon.exe or
Csrss.exe, you may have to use a different tool to generate a memory
dump file of the process that fails. For more information, click
the following article number to view the article in the Microsoft
Knowledge Base:
241215
(http://support.microsoft.com/kb/241215/
)
How to use the Userdump.exe tool to create a dump file Note
Follow the instructions in the Knowledge Base article to
troubleshoot a process that shuts down with an exception. While you
follow these instructions, monitor the following processes to
troubleshoot the STOP 0xC000021A error:
Note
Most STOP 0xC000021A errors occur because Winlogon.exe fails. This
typically occurs because of a faulty third-party Graphical
Identification and Authentication (GINA) DLL. The GINA is a
replaceable DLL component that Winlogon.exe loads. The GINA
implements the authentication policy of the interactive logon model.
The GINA performs all identification and authentication user
interactions.
Value = GinaDLL REG_SZ
If
this error first occurred after the installation of a new or
updated device driver, system service, or third-party program, the new
software should be removed or disabled. Contact the manufacturer of
the software to see if an update is available. For more
information about hardware and software vendor contact information,
visit the following Microsoft Web site:
-
http://support.microsoft.com/gp/vendors
(http://support.microsoft.com/gp/vendors)
Last known good configuration If the previous steps in this article do not resolve
the problem, start the computer by using the last known good
configuration. To start the computer by using the last known good
configuration, follow these steps:Note Because there are
several versions of Microsoft Windows, the following steps may be
different on your computer. If they are, see your product
documentation to complete these steps.
NUM LOCK must be off before the arrow keys on the numeric keypad will function.
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