Chrome Extension Not Appearing in Toolbar: Fixes - Error 0x80073cf9 Windows Store: Step-by-Step Guide-OneDrive Sync Error 0x8004de40 Troubleshooting

Updated 2026-06-17 23:07:35browser-issues
Chrome Extension Not Appearing in Toolbar: Fixes - Error 0x80073cf9 Windows Store: Step-by-Step Guide-OneDrive Sync Error 0x8004de40 Troubleshooting
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.