How to Fix Windows Sandbox Not Working in Windows 11

Windows Sandbox is a built-in security feature in Windows 11 that allows you to run applications in an isolated, disposable virtual environment. It is commonly used to test untrusted software, open suspicious files, or experiment with system changes without affecting the main operating system.

When Windows Sandbox is not working, users may see errors such as Sandbox failing to launch, closing immediately after opening, virtualization errors, or messages stating that Sandbox is unavailable. These issues usually occur due to disabled virtualization, missing Windows features, incompatible system settings, or corrupted system components.

Fixing Windows Sandbox not working in Windows 11 involves checking system requirements, enabling required features, and ensuring virtualization and Windows components are configured correctly. The steps below explain how to resolve the issue and restore Sandbox functionality.

How to Fix Sandbox Not Working in Windows 11

Before starting the fixes, it is important to understand that Windows Sandbox is only supported on Windows 11 Pro, Education, and Enterprise editions. It will not work on Windows 11 Home.

The methods below focus on enabling required features, fixing virtualization issues, and repairing system components. Follow the steps in order and test Windows Sandbox after each method.

1. Check Windows 11 Edition Compatibility

Windows Sandbox is not available on all editions.

1. Press Windows + R, type winver, and press Enter.
2. Check your Windows edition.
3. Confirm you are using Windows 11 Pro, Education, or Enterprise.

If you are on Windows 11 Home, Sandbox cannot be enabled.

2. Enable Windows Sandbox Feature

Sandbox must be enabled manually.

1. Press Windows + R, type optionalfeatures.exe, and press Enter.
2. Locate Windows Sandbox in the list.
3. Check the box next to Windows Sandbox.
4. Click OK.
5. Restart the computer when prompted.

This installs the required Sandbox components.

3. Enable Virtualization in BIOS or UEFI

Sandbox depends on hardware virtualization.

1. Restart the computer.
2. Enter BIOS or UEFI settings.
3. Locate Virtualization, Intel VT-x, or AMD-V settings.
4. Enable virtualization.
5. Save changes and exit BIOS.
6. Boot back into Windows.

Without virtualization, Sandbox cannot start.

4. Verify Virtualization Is Enabled in Windows

Confirm that Windows detects virtualization.

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Go to the Performance tab.
3. Select CPU.
4. Check that Virtualization shows Enabled.

If it shows disabled, BIOS settings need correction.

5. Enable Required Windows Features

Sandbox relies on additional components.

1. Open Windows Features again.
2. Ensure the following are enabled:
   • Hyper-V
   • Virtual Machine Platform
3. Click OK and restart the system.

Missing components can prevent Sandbox from launching.

6. Disable Conflicting Virtualization Software

Third-party virtualization tools can block Sandbox.

1. Close apps such as VirtualBox, VMware Workstation, or Android emulators.
2. Disable or uninstall them temporarily.
3. Restart the computer.
4. Try launching Windows Sandbox again.

Only one virtualization platform can run at a time.

7. Turn Off Core Isolation Memory Integrity

Memory Integrity can cause Sandbox startup issues.

1. Open Windows Security.
2. Go to Device security.
3. Select Core isolation details.
4. Turn off Memory integrity.
5. Restart the computer.

This resolves compatibility issues on some systems.

8. Repair Corrupted System Files

System corruption can break Sandbox components.

1. Open Terminal (Admin).
2. Run the following command: sfc /scannow
3. After completion, run: DISM /Online /Cleanup-Image /RestoreHealth
4. Restart the computer.

These tools repair missing or damaged system files.

9. Update Windows 11

Bugs affecting Sandbox may be fixed in updates.

1. Open Settings.
2. Go to Windows Update.
3. Install all available updates.
4. Restart the system.

Updates improve virtualization and feature stability.

10. Reset Windows Sandbox Configuration

Reinstalling Sandbox can resolve persistent issues.

1. Open Windows Features.
2. Uncheck Windows Sandbox.
3. Restart the computer.
4. Reopen Windows Features.
5. Enable Windows Sandbox again.
6. Restart once more.

This refreshes Sandbox completely.

Final Thoughts

Windows Sandbox not working in Windows 11 is usually caused by disabled virtualization, unsupported Windows editions, missing Windows features, or conflicts with other virtualization software. In most cases, enabling virtualization in BIOS and turning on the required Windows features resolves the issue quickly.