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Fix Windows Update Config Sync Issues Between Devices - Fix Windows Defender Service Authentication Failed Error-How to Enable Grayed Out Defender Real-Time Protection

Updated 2026-06-14 03:40:13developer-tools
Fix Windows Update Config Sync Issues Between Devices - Fix Windows Defender Service Authentication Failed Error-How to Enable Grayed Out Defender Real-Time Protection
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.