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Fix Windows 11 Installation Assistant Stuck at 99% - Fix DNS Probe Finished NXDOMAIN Caused by Antivirus Blocking-Fix Windows Update Error 0x800f081f Missing Files

2026-07-28 12:52:58developer-tools
Fix Windows 11 Installation Assistant Stuck at 99% - Fix DNS Probe Finished NXDOMAIN Caused by Antivirus Blocking-Fix Windows Update Error 0x800f081f Missing Files

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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