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Fix Nginx Config Test Fails with 'upstream host not found' - Windows Security Not Working After Update? Try These Fixes-How to Fix Windows Defender Error 0x80070002 and High Memory

2026-06-13 13:47:25office-tools
Fix Nginx Config Test Fails with 'upstream host not found' - Windows Security Not Working After Update? Try These Fixes-How to Fix Windows Defender Error 0x80070002 and High Memory

Final checklist

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