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How to Fix Chrome High CPU Usage on Windows 10 - Outlook SMTP Server Not Responding Guide-Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Caused by Antivirus

Updated 2026-06-18 13:00:28cloud-software
How to Fix Chrome High CPU Usage on Windows 10 - Outlook SMTP Server Not Responding Guide-Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Caused by Antivirus
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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