Fix Chrome ERR_TUNNEL_CONNECTION_FAILED on Windows 10 - How to Fix Windows Defender That Keeps Stopping and Starting-Fixing SQLite Database Locked and Permission Denied Errors
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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