OneDrive Sync Proxy Error: Troubleshooting Checklist - Windows Defender Won't Open: Fix Stuck Loading-Windows 10 OneDrive Sync Timeout Troubleshooting

Updated 2026-06-14 03:25:38security-tools
OneDrive Sync Proxy Error: Troubleshooting Checklist - Windows Defender Won't Open: Fix Stuck Loading-Windows 10 OneDrive Sync Timeout 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.