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Fix 'Windows Update Service Not Running Permission Denied' - Troubleshoot Windows Update DNS Resolution Errors-How to Fix Windows Defender Connection Refused Error

Updated 2026-06-13 16:04:02windows-fixes
Fix 'Windows Update Service Not Running Permission Denied' - Troubleshoot Windows Update DNS Resolution Errors-How to Fix Windows Defender Connection Refused Error
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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