What does NTSTATUS 0xC000021A (STATUS_SYSTEM_PROCESS_TERMINATED) mean?

STATUS_SYSTEM_PROCESS_TERMINATED

A critical system process terminated

STATUS_SYSTEM_PROCESS_TERMINATED (0xC000021A) is a fatal system state: a process that Windows requires for the interactive system environment terminated unexpectedly. The status is commonly associated with critical user-mode system processes such as Winlogon or CSRSS, but the useful evidence is the actual process and termination status recorded for this boot.

What to capture before repair

• Preserve the crash or kernel dump, the critical process name, its termination status, and the two additional status parameters when available.
• Collect the System and Application event sequence immediately before the stop, including servicing, driver, security-software, logon, and file-replacement events.
• Compare system binaries and servicing state when the failure began after an update, rollback, image restore, or offline file replacement.

Diagnostic boundary

This code is not an Azure-VM-specific boot error and does not imply that restoring a VM backup is the universal remedy. It reports the fatal termination boundary. The cause can be a damaged or mismatched system component, a failed logon/security component, third-party code injected into the critical process, or another condition that caused that process to exit.

Recovery

Repair the first verified cause while preserving evidence from the failing boot. If recovery media or offline servicing is required, change only the component identified by the dump or event sequence. After the machine boots, verify that the same critical process remains running and that the original lower-level failure no longer appears.

References

• Microsoft Open Specifications: NTSTATUS values
• Microsoft: Stop 0xC000021A