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What is it, and how to fix this problem whith Windows Sanbox on Windows 11 Pro??

Вячеслав Романов 5 Reputation points
2025-02-08T15:49:17.4933333+00:00

Hello, what should I do if I have an error in the Windows Sandbox "Windows Sandbox failed to initialize.

Exception of type 'System.Exception' was thrown." What should I do? my OS is Windows 11 Pro . I really need Windows Sandbox.

Windows
Windows
A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.
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Hyper-V
Hyper-V
A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
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Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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  1. sandboxguy 0 Reputation points
    2025-02-09T20:16:27.27+00:00

    Same here: just fresh-updated to the latest Windows 11 version and Sandbox stopped working (again), and throwing this hilarious error: "Object reference not set to an instance of an object".

    Quick question: why do you guys keep releasing broken stuff? Why don't you just wait for things to be ready for prime time, instead of relying on (paying) users to do the beta (alpha?) testing?

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  2. Ian Xue 39,371 Reputation points Microsoft Vendor
    2025-02-11T04:09:59.3733333+00:00

    Hi Вячеслав Романов,

    Thanks for your post. Before moving on, to narrow down the issue, please help verify the Sandbox is installed in the supported OS.

    Windows Sandbox - Windows Security | Microsoft Learn

    Also, please open Windows PowerShell as administrator and run this command to enable the sandbox.

    Enable-WindowsOptionalFeature -FeatureName "Containers-DisposableClientVM" -All -Online

    Run these commands to see if the error can be fixed.

    DISM /Online /Cleanup-image /RestoreHealth

    sfc /scannnow

    If the error persists, run bcdedit.exe in PowerShell and make sure the hypervisorlaunchtype is set to Auto. If not, run

    bcdedit.exe /set hypervisorlaunchtype auto

    You can also open services.msc and manually restart the services Hyper-V Host Computer Service (vmcompute) and Hyper-V Virtual Machine Management (vmms).

    Best Regards,

    Ian Xue

    If the Answer is helpful, please click "Accept Answer" and upvote it.

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