Clear DNS Cache to Fix Windows Activation Timeout - Fix Defender Issues by Clearing Cache-Resolve ERR_PROXY_CONNECTION_FAILED in Chrome

Updated 2026-06-18 02:02:09macos-help
Clear DNS Cache to Fix Windows Activation Timeout - Fix Defender Issues by Clearing Cache-Resolve ERR_PROXY_CONNECTION_FAILED in Chrome
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.