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Fix 'Windows Defender File Locked Cannot Access' Error - Windows Update Error 0x80070643 Fix Guide-How to Clear Windows Update Cache in Windows 10

2026-06-13 15:08:34developer-tools
Fix 'Windows Defender File Locked Cannot Access' Error - Windows Update Error 0x80070643 Fix Guide-How to Clear Windows Update Cache in Windows 10

Final checklist

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

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