Windows Security Log Event ID 521

521: Unable to log events to security log

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This event is logged if Windows was unable to write events to the Security event log.

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Description Fields in 521

• Status code: The code of the reason of the error. Typical values might include:
  • 0xc0000005 (STATUS_ACCESS_VIOLATION)
  • 0xc0000008 (STATUS_INVALID_HANDLE)
  • 0xc0000017 (STATUS_NO_MEMORY)
• Value of CrashOnAuditFail: Whether the system should halt when not able to write to security log. See event 4906 for possible values.
• Number of failed audits: The number of events affected.

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