zhizhu
Home / developer-tools / Fix Windows Defender Update Error 0x800f0906 - Fix Port Already in Use on Docker Compose-How to Fix Windows Security Cache Error

Fix Windows Defender Update Error 0x800f0906 - Fix Port Already in Use on Docker Compose-How to Fix Windows Security Cache Error

2026-06-13 15:59:35developer-tools
Fix Windows Defender Update Error 0x800f0906 - Fix Port Already in Use on Docker Compose-How to Fix Windows Security Cache Error

Final checklist

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