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Windows Defender Service Not Starting in Windows 10: Fixes - How to Fix Cloudflare 525 Timeout: SSL Handshake Failed-Fix Windows Defender Dependency Conflict Registry Error

Updated 2026-06-13 20:40:08office-tools
Windows Defender Service Not Starting in Windows 10: Fixes - How to Fix Cloudflare 525 Timeout: SSL Handshake Failed-Fix Windows Defender Dependency Conflict Registry Error
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.