Microsoft officially announced that the Windows Sandbox will be arriving to Windows 10 next year.
The Windows Sandbox is a lightweight desktop environment that allows you to run any applications safely in an isolated, temporary ‘virtual machine’. It will need virtualization capabilities to be enabled in BIOS but that’s pretty much it.
Once you have finished running the app in this mode, the sandbox in itself will be deleted. Every time the Sandbox is enabled it creates a 100MB installation of Windows in order to run an app by spawning a kernel that’s completely isolated from your PC.
The feature will be available for Windows 10 testers when build 18305 (or later) will become available but if you want to know more details, you can read all about the feature on Microsoft’s blog.