Unable to install Sandbox in Build 1903 Solved

  1. Posts : 268
    Win10 Ver. 1809 Build 17763.`

    Unable to install Sandbox in Build 1903

    I followed the steps shown here: Enable Windows Sandbox Feature in Windows 10 Home Edition but the installation failed because it said it could not find sandbox.txt on my desktop.

    This was confusing because the downloaded ZIP file had no file of this name. It did have a file named readme.txt so I renamed this to sandbox.tct but that did not help. Then I thought maybe Ineeded to enable virtualization in my BIOS - so I did that. But that did not help. So I wonder if anyone has been able to successfully install on Home 1903. If so I'd like to know what the secret is.
      My ComputerSystem Spec

  2. thomaseg1's Avatar
    Posts : 2,251
    Windows 10 Professional (x64) Version 1903

    Have you enabled Hyper V and sandbox in Programs and features?
      My ComputersSystem Spec

  3. Posts : 268
    Win10 Ver. 1809 Build 17763.`
    Thread Starter

    No - because I can't get it installed.

    Am i missing something ??
      My ComputerSystem Spec

  4. Ztruker's Avatar
    Posts : 8,480
    Windows 10 Pro X64 1903 189362.439

    Is your account an Administrator?

    sandbox.txt is created by the batch file:
    dir /b %SystemRoot%\servicing\Packages\*Containers*.mum >sandbox.txt

    If I run that on my Win 10 Pro system I get 46 .mum files listed. Run the above then look at sandbox.txt.
      My ComputersSystem Spec

  5. Bree's Avatar
    Posts : 11,959
    10 Home x64 (1903) (10 Pro on 2nd pc)

    bbinnard said: View Post
    ...the installation failed because it said it could not find sandbox.txt on my desktop...
    Ztruker said: View Post
    sandbox.txt is created by the batch file..

    If you have Controlled Folder Access turned on it may have blocked creating sandbox.txt on the Desktop, that's one of the protected folders. Turn it off temporarily and try again.

    Enable or Disable Controlled Folder Access in Windows 10
      My ComputersSystem Spec

  6. Posts : 268
    Win10 Ver. 1809 Build 17763.`
    Thread Starter

    Thanks Bree - you hit the nail on the head. Once I disabled desktop protection the install ran smooth as silk. When I rebooted my system it came back OK and I checked Control Panel/Windows Features/Windows Sandbox and it was checked. I also verified that Task Manager/Performance showed the Virtualization was enabled.

    Everything looks exactly the same as before (meaning before I enabled Sandbox) - so does this mean that until I reboot with the Windows Sandbox feature unchecked any changes I make to my boot drive will be lost? And the only way I can get back to "normal" function is to uncheck Windows Sandbox and reboot?

    The system obviously knows when it is running in Sandbox mode, so it seems to me it would be a good idea to put some notification on the taskbar (or somewhere visible) that says Sandbox is active. I'm on Home; maybe Pro does this.


    Silly me - I failed to understand that Sandbox is an app that runs init's own window. Now I know I just have to start it when needed. To make this easier I've put the Sandbox icon on my task bar.
    Last edited by bbinnard; 18 May 2019 at 13:27.
      My ComputerSystem Spec


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