Windows Defender Real-Time Protection Troubleshooting Checklist
If Windows Defender real-time protection fails to turn on or keeps turning off, you may see warni...
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Browse labHow to Reset Windows Security App Settings
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How to Reinstall Windows Security App (Microsoft Defender)
If the Windows Security app (Microsoft Defender) is missing, crashing, or not opening, reinstalli...
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If you see a 'Secure Connection Failed' error in Firefox that mentions date or time, it u...