Check Which Process Is Using a Port on Windows - Windows Defender Permission Denied Error: Causes and Fixes-How to Solve Windows Activation Connection Timeout
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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