Fix OneDrive Sync Setup Login Loop on Windows - How to Resolve Teams Service Unavailable After Update-Fix Windows Defender Update Error 0x80070643

Updated 2026-06-13 22:24:38cloud-software
Fix OneDrive Sync Setup Login Loop on Windows - How to Resolve Teams Service Unavailable After Update-Fix Windows Defender Update Error 0x80070643
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.