What is Sandbox? In short, Windows Sandbox is half app, half virtual machine. It lets you quickly spin up a virtual clean OS imaged from your system’s current state so that you can test programs or files in a secure environment that’s isolated from your main system. When you close the sandbox, it destroys that state. Nothing can get from the sandbox to your main installation of Windows, and nothing remains after closing it.
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How Do I Get It? All you need is a modern version of Windows 10 running Windows 10 Professional or Enterprise—Windows 10 Home doesn’t have this feature. The Sandbox feature became stable back in May 2019.
Step One: Make Sure Virtualization is Enabled First, you’ll need to make sure virtualization is enabled in your system’s BIOS. It typically is by default, but there’s an easy way to check. Fire up Task Manager by hitting Ctrl+Shift+Esc and then head to the “Performance” tab. Make sure the “CPU” category is selected on the left and on the right, just make sure it says “Virtualization: Enabled.”