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Fix Microsoft Edge Sync Error 0x80070424 - How to Fix Windows 11 Installation Stuck at 99%-Windows Security App Won't Open in Safe Mode: Fixes

Updated 2026-07-28 16:49:14developer-tools
Fix Microsoft Edge Sync Error 0x80070424 - How to Fix Windows 11 Installation Stuck at 99%-Windows Security App Won't Open in Safe Mode: Fixes
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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