Windows 11 Sandbox not working

Dear Kimi,

Thank you for posting your question on our forum.

Research shows that the problem is being encountered by quite a few users: https://answers.microsoft.com/en-us/windows/forum/all/windows-11-sandbox-not-working-after-recent-23h2/0168c40f-f279-45eb-acfb-8c83564ffcfd

Please see our recommendations below:

1. Re-enable Windows Sandbox:

- open the Windows Features dialog by searching for "Windows Features" in the Start menu;

- uncheck the box next to "Windows Sandbox" and click OK;

- restart your computer;

- open Windows Features again, check the box next to "Windows Sandbox," and click OK;

- restart your computer once more.

2. Check and start required services:

- press Win + R, type services.msc, and press Enter;

- locate "Hyper-V Remote Desktop Virtualization Service";

- right-click it, select Properties, and set Startup type to "Automatic";

- click Start, then Apply, and finally OK.

3. Update Windows:

- open Settings (Win + I);

- navigate to Windows Update;

- click "Check for updates" and install all available updates.

4. Run SFC Scan:

- open Command Prompt administrator;

- type sfc /scannow and press Enter;

- wait for the process to complete and restart your computer.

5. Ensure that virtualization is enabled in your system's BIOS/UEFI settings. The exact steps may vary depending on the motherboard, but generally:

- restart your computer and enter BIOS/UEFI (usually by pressing F2, Del, or F12 during startup);

- look for an option like "Virtualization Technology" or "Intel VT-x" and enable it;

- save changes and exit.

Should you have any other questions or need further assistance, please do not hesitate to contact us.