The current Windows 10 Insider Build 16257 includes upcoming features of Redstone 3 and Windows 10 1709. Also included are all the features of the Windows Defender Application Guard (WDAG). The feature will work like a sandbox. The feature is intended to prevent malicious content and downloaded files from harming the system. After surfing, the isolated tab closes and clears all malicious code together with the temporary container. Admins can already create Whitelists from harmless pages that start in conventional Edge windows. Pages not listed then open in an application guard container within Edge.