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Chrome Sync Not Working: 8 Practical Troubleshooting Steps - Fix Windows Security Error 0x80072efd (Proxy Issue)-Windows Update Version Mismatch Error Fix

Updated 2026-06-14 02:51:06developer-tools
Chrome Sync Not Working: 8 Practical Troubleshooting Steps - Fix Windows Security Error 0x80072efd (Proxy Issue)-Windows Update Version Mismatch Error Fix
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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