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How to Fix Git Detached HEAD State and Undo Changes - Nginx Port 80 Connection Refused: Causes and Fixes-Windows Defender Real-Time Protection Greyed Out: How to Fix

Updated 2026-07-28 15:28:48developer-tools
How to Fix Git Detached HEAD State and Undo Changes - Nginx Port 80 Connection Refused: Causes and Fixes-Windows Defender Real-Time Protection Greyed Out: How to Fix
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.

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