How to Use Windows Sandbox to Safely Test Software in Windows 11

If you regularly download files from the internet, you have likely encountered situations where you are unsure if a program is safe to run. In the past, users had to rely entirely on antivirus software or set up complicated third-party virtual machines to test suspicious files. However, Microsoft has introduced a brilliant, built-in solution: Windows Sandbox.

Windows Sandbox provides a temporary, isolated desktop environment where you can safely test untrusted software, open suspicious email attachments, or browse potentially dangerous websites. Once you close the application, the entire environment is permanently deleted, leaving your main operating system completely unaffected.

What is Windows Sandbox?

Windows Sandbox is essentially a lightweight virtual machine created on demand. It uses hardware-based virtualisation for kernel isolation, ensuring that the sandbox runs entirely separately from your host PC.

The beauty of this feature is its simplicity. Every time you launch Windows Sandbox, it generates a pristine, clean installation of Windows 11. Any changes made inside the sandbox—whether that involves installing a program, altering registry keys, or accidentally downloading malware—remain trapped inside. When you close the window, all data is instantly wiped.

System Requirements for Windows Sandbox

Before you can enable the feature, your computer must meet the following prerequisites:

• Operating System: Windows 11 Pro, Enterprise, or Education (Windows 11 Home does not natively support this feature).
• Virtualisation: Hardware virtualisation must be enabled in your computer’s BIOS or UEFI settings.
• Architecture: An AMD64 or ARM64 architecture processor.
• Memory: At least 4GB of RAM (8GB is recommended).
• Storage: At least 1GB of free disk space (an SSD is highly recommended).

How to Enable Windows Sandbox in Windows 11

Because Windows Sandbox is an optional feature, it is turned off by default. Follow these steps to enable it:

1. Click the Start button on your taskbar and search for Turn Windows features on or off.
2. Select the top result to open the Windows Features dialog box.
3. Scroll down the list until you find Windows Sandbox.
4. Check the box next to Windows Sandbox.
5. Click OK. Windows will now search for the required files and apply the changes.
6. Once the installation is complete, click Restart now to reboot your computer and finalise the setup.

How to Use Windows Sandbox to Test Software

Using the sandbox is incredibly straightforward once it is enabled. Here is how to test a file safely:

1. Click the Start button, type Windows Sandbox, and press Enter to launch the application. You may need to grant administrator permissions.
2. A new window will appear, displaying a clean, secondary Windows 11 desktop.
3. To test a file from your main computer, simply copy the file (Ctrl + C) on your host machine, click inside the Windows Sandbox window, and paste it (Ctrl + V) onto the sandbox desktop.
4. Run the file or install the software inside the sandbox. You can monitor how it behaves without any risk to your actual PC.
5. When you are finished testing, simply click the X in the top-right corner to close the sandbox window.
6. A warning prompt will appear, reminding you that all content will be discarded and permanently lost. Click OK to confirm.

By incorporating Windows Sandbox into your workflow, you can drastically improve your digital security and experiment with new software without cluttering or compromising your main computer.