Microsoft has built Windows Defender Antivirus to run in a sandboxed environment. The feature is now available to Windows Insiders to test in upcoming versions of Windows 10. Windows Defender runs with high privileges to scan systems for malicious content. Microsoft has been hardening Windows 10 over time with hardware-based isolation, network protection, controlled folder access, and other tech. The tool is already a prime target for cyberattacks, but Microsoft says it hasn’t seen attacks targeting its antivirus tool in the wild.”]
Source: https://www.darkreading.com/analytics/windows-defender-first-full-antivirus-tool-to-run-in-a-sandbox