The Windows Sandbox tool acts as a temporary virtual desktop environment.
This post fromMiniTooltells you how to fix it.
To do that, you’ve got the option to try theprofessional backup software MiniTool ShaodwMaker.

Step 1: TypeWindows Featuresin theSearchbox.
Step 2: LocateWindows Sandboxand uncheck the box and clickOK.
Then, check it again and clickOK.
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Is Windows 10 Sandbox greyed out in the Windows Features interface?
This post will show you how to enable Windows Sandbox in Windows 10.
Step 2: Locate theHyper-V Remote Desktop Virtualization Service, right-click it to selectProperties.

Step 3: Next, go to theGeneraltab and click theStartup typedrop-down menu to selectAutomatic.
Step 4: Click theStart>Apply>OKto save these changes.
Step 2: FindVirtual Machine PlatformandWindows Hypervisor Platform, and check the boxes beside them.

Step 3: ClicktheOKbutton.
Step 1: PressWindows+ Ito openSettings.
Step 2: Go toSystem, then clickTroubleshootand clickOther troubleshooters.
Fix 5: Run SFC
Step 1: Launch Command Prompt as administrator.
Step 2: Typesfc /scannowand pressEnter.
This process may take you much time to scan, and you just need to wait patiently.
Here are the steps:
Step 1: In theSearchmenu, inputcontrol paneland open it.
Step 2:ClickRecoveryand clickOpen System Restoreto continue.
Step 3: In theRestore system files and settingsinterface, clickNextto continue.
Step 4: Select a restore point and clickNextto continue.
Step 5: you gotta confirm the restore point and clickFinish.
After the system restore is finished, give a shot to shut down your box again.
Fix 7: Check for Updates
Step 1: Press theWindows + Ikeys together to openSettings.
Step 2: Go toUpdates & Security.
Then Windows will search for available updates.
Just follow the on-screen instructions to finish the process.
you’re free to try them one by one.
I hope that this post can be useful to you.