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Windows Update Stuck at 100% for Hours: Practical Fixes - Windows Defender Not Starting After Update-BitLocker Key Invalid? Here's How to Solve It

Updated 2026-06-13 11:52:23office-tools
Windows Update Stuck at 100% for Hours: Practical Fixes - Windows Defender Not Starting After Update-BitLocker Key Invalid? Here's How to Solve It
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.