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Fix Redis Server Not Starting: Port Already in Use - Windows Defender Config Troubleshooting Checklist-Fix Windows Security Blank Screen in Command Prompt

Updated 2026-06-13 14:17:18office-tools
Fix Redis Server Not Starting: Port Already in Use - Windows Defender Config Troubleshooting Checklist-Fix Windows Security Blank Screen in Command Prompt
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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