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Home / windows-fixes / Fix Windows Defender Service Not Starting (Error 0x80070422) - How to Fix Redis Connection Refused Due to Firewall-Troubleshooting Firefox Profile Error Code 0x80520007

Fix Windows Defender Service Not Starting (Error 0x80070422) - How to Fix Redis Connection Refused Due to Firewall-Troubleshooting Firefox Profile Error Code 0x80520007

Updated 2026-06-16 00:07:26windows-fixes
Fix Windows Defender Service Not Starting (Error 0x80070422) - How to Fix Redis Connection Refused Due to Firewall-Troubleshooting Firefox Profile Error Code 0x80520007
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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