Windows 10: Sandbox not starting after May Update 2021 - Error 0x80070020

I like to use the Windows Sandbox quite a bit, it functioned perfectly before the latest update. Since then it crashes on startup with the errorcode 0x80070020.Hope someone has an idea on how to fix it.System information:Edition Windows 10 Pro Version 21H1Build 19043.985CPU: Ryzen 5 2600

:)

 

Fix for Sandbox

Microsoft has acknowledged this issue now:

Windows Sandbox may fail to start with error code “0x80070002”Windows Sandbox may fail to start with "ERROR_FILE_NOT_FOUND (0x80070002)" on devices in which the operating system language is changed during the update process when installing Windows 10, version 1903.


Affected platforms:

• Client: Windows 10, version 1903

Next steps: We are working on a resolution and estimate a solution will be available in late June.

 

Can't open Windows Sandbox Error 0x80070002

Microsoft now list a known issue:

https://docs.microsoft.com/en-us/win...903#456msgdesc


Windows Sandbox seems fragile on 1903 for a bunch of reasons; mine won't start with a different error code.

Feedback Hub reports for "Windows Sandbox won't start" mention about 25 different error codes experienced.

 

Error 0x80070020 updating to version 1709

I'm getting the same error code as above. I'm not running any .iso. The error reads - There were problems installing some updates, but we'll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: 2018-05 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4103727) - Error 0x80070020.

I think what happened was that the update was downloading and stopped at 74% downloaded. So, I went away for 30 minutes and came back and it was still stuck on 74% downloaded. Then, I rebooted, thinking it might help. It didn't help. Any suggestions?