Windows Defender Application Guard basically runs an Edge window (or Microsoft Office applications) in a HyperV VM to enable very secure browsing with very little chance of anything bad escaping.
Enable by going to Programs and Features, Turn Windows features on or off.
https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-application-guard/md-app-guard-overview


Keywords: Secure, Isolated, VM, Virtual Machine, Safe Browsing, Malware, Protected, Web Browser, Edge, Office, Word, Excel