What is Windows Sandbox?

TheWindows Sandboxis a feature that provides users with a completely isolated Windows environment to test in.

Unfortunately, Windows 10 and 11 Home users cant use the feature.

Laptop on the Windows 11 settings screen coming out of a toggle button.

It looks a lot like a virtual machine, but its a little bit different.

For starters, this isnt your typical VM.

Its self-destructing, meaning that when you exit the sandbox, it completely resets.

The Razer Blade 16 2025 gaming laptop sitting open on a desk.

What Should You Use the Windows Sandbox For?

Lets look at the basics.

First, most users will receive a malware infection because of something that they themselves do.

An open Windows Sandbox window on Windows 11, showing a warning prompt about the erasure of data when the sandbox is closed.

You might be lucky.

You might find that those infections are picked up by Microsoft Defender (or your own third-party antivirus).

In sandbox mode, however, it doesnt matter.

Opening the Optional Features settings menu in Windows 11 via the Run dialog box

The infection cant damage anything.

If you see a problem, you’re able to just kill the sandbox app.

The infection is wiped without impacting anything in your main Windows installation.

To enable Windows Sandbox, select the Windows Sandbox checkbox in the Optional Features menu before pressing OK.

I use the sandbox mode for any new app I install where I might question its origins or safety.

Ive also used it in the past to open up file attachments, especially with more troublesome file extensions.

Microsofts minimum requirements for a PC capable of running Windows Sandbox include:

Theres also the licensing to consider.

Opening Windows Sandbox via the Windows 11 start menu.

As I mentioned, you cant use the sandbox mode in Windows 10 or Windows 11 Home.

To start with, check that that youveenabled virtualization for your CPUin your BIOS or UEFI menu.

To do this quickly, press theWindows+R, punch in “optionalfeatures”, and press “OK”.

An open Windows Sandbox window on a Windows 11 PC

A good example is session hijacking.

A rather famous incident in recent years was theattack on the Linus Tech Tips YouTube channel.

An employee downloaded and opened a rogue PDF file, which contained rogue code.

A custom configuration file for a Windows Sandbox environment in a Notepad window

Mayhem ensued, but it didnt have to be that way.

The moral of the story?

Use the sandbox as a sandbox for one thing at a time.

Opening Windows Sandbox via a custom configuration using a .wsb configuration file in File Explorer

If you want to test a file, you should only open that file.

When you want to run your sandbox without online grid access, just double-snag the file.

Itll run with that configuration, with access to your PCs data pipe adapter blocked entirely.

Cant Use Windows Sandbox?

It wont be self-destructing, but the same principles can still apply.

Just open up Windows Sandbox instead.