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Fix OneDrive Sync Blocked by Third-Party Antivirus File Lock - Windows Defender Definition Update Error Fix-Outlook Blank Screen Not Responding Fix

2026-06-14 00:57:16browser-issues
Fix OneDrive Sync Blocked by Third-Party Antivirus File Lock - Windows Defender Definition Update Error Fix-Outlook Blank Screen Not Responding Fix

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.