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Microsoft is working on Windows Sandbox, a sandboxed environment for the Windows operating system, currently.

The feature is being tested in Windows 10 Insider Builds currently and it is possible that Windows Sandbox will find its way into Windows 10 version 1903.

The initial version of Windows Sandbox was quite basic: users could launch it on Windows 10 devices and use it, but that was about the scope of it.

Sandbox Config files

Starting with the latest builds, it is now possible to use config files to customize certain aspects. Config file support is basic at this point but it allows administrators and users to launch apps or scripts automatically in the sandbox. In other words: you may run something in the sandboxed environment automatically.

The config files use XML and have the extension .wsb. You may run any .wsb file with a double-click or by running it from the command line or by using scripts.

Windows Sandbox .wsb scripts support the following configuration options currently:

• Enable or disable the virtualized GPU.
  
  
• Enable or disable networking in the sandbox.
  
  
• Share folders from the host.
  
  
• Run a startup script or program.
  

Most options are straightforward at this point in time.

Full reading: https://www.ghacks.net/2019/02/22/how-windows-sandbox-config-files-work/