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Fix Firefox Secure Connection Failed on Windows 10 - Windows 11 Update Freezes at 0%: How to Fix-Fix Grayed Out Windows Defender Real-Time Protection in Windows 10

Updated 2026-07-28 05:38:16office-tools

Fix Firefox Secure Connection Failed on Windows 10 - Windows 11 Update Freezes at 0%: How to Fix-Fix Grayed Out Windows Defender Real-Time Protection in Windows 10

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.