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Home / security-tools / How to Fix Chrome Browser Proxy Error (ERR_PROXY_CONNECTION_FAILED) - OneDrive Sync File Locked: Step-by-Step Checklist-Improve OneDrive Sync Performance

How to Fix Chrome Browser Proxy Error (ERR_PROXY_CONNECTION_FAILED) - OneDrive Sync File Locked: Step-by-Step Checklist-Improve OneDrive Sync Performance

Updated 2026-06-14 00:27:00security-tools
How to Fix Chrome Browser Proxy Error (ERR_PROXY_CONNECTION_FAILED) - OneDrive Sync File Locked: Step-by-Step Checklist-Improve OneDrive Sync Performance
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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