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Fix PostgreSQL Connection Refused on Port 5432 - Windows Security DNS Error: Antivirus Conflict Fix-Jupyter Kernel Startup Failure VS Code

2026-06-13 14:14:33office-tools
Fix PostgreSQL Connection Refused on Port 5432 - Windows Security DNS Error: Antivirus Conflict Fix-Jupyter Kernel Startup Failure VS Code

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.