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How to Reset Windows Defender Real-Time Protection - Fix ERR_CONNECTION_RESET After Chrome Update-Nginx Port 80 Connection Refused: Causes and Fixes

Updated 2026-07-28 17:20:35security-tools
How to Reset Windows Defender Real-Time Protection - Fix ERR_CONNECTION_RESET After Chrome Update-Nginx Port 80 Connection Refused: Causes and Fixes
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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