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Microsoft Store Failed to Start: Step-by-Step Checklist - Fix Windows Defender File Locked During Scan-Task Scheduler Certificate Error Post-Update Fix

2026-06-14 05:44:17
Microsoft Store Failed to Start: Step-by-Step Checklist - Fix Windows Defender File Locked During Scan-Task Scheduler Certificate Error Post-Update Fix

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.