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How to Fix Error 0x80070643 When Windows Update Fails - Resolve Cloudflare 521 on Apache Server-Windows Update File Locked Error Fix

Updated 2026-06-13 13:10:07cloud-software
How to Fix Error 0x80070643 When Windows Update Fails - Resolve Cloudflare 521 on Apache Server-Windows Update File Locked Error Fix
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.