Welcome to the Dell Community @David300 

To increase security, it allows only apps from the Microsoft Store, and requires Microsoft Edge for safe browsing.

The built-in security of this mode automatically prevents viruses and other threats from running on your device, and you'll receive security updates automatically.

https://support.microsoft.com/en-us/windows/virus-threat-protection-in-windows-security-1362f4cd-d71a-b52a-0b66-c2820032b65e

Best regards,

U2