Microsoft says it is trying to fix a bug that prevents Windows Sandbox and its opening Windows Defender Application Guard.
The problem affects the versions of Windows 10 1903, 1909 and 2004. The error activates one of the messages "ERROR_VSMB_SAVED_STATE_FILE_NOT_FOUND (0xC0370400)" or "E_PATHNOTFOUND (0x80070003)".
The Windows Sandbox is a relatively new version of publishing Windows 10 Pro and Enterprise from 1903 onwards, which allows users to start a virtual machine with a basic version of Windows 10 to run potentially suspicious software without the risk of affecting their main installation Windows 10.
The feature has proven popular with IT professionals because of its ability to run potentially dangerous executables safely in a container, and Microsoft has added several improvements to the Windows Sandbox version. Windows 10 2004.
The Windows Defender Application Guard (WDAG) is also a relatively new feature in the versions of Windows 10 Pro and Enterprise that administrators can use to create a list of trusted sites and local resources.
WDAG comes into play when users try to open a URL that is not in the list. Starts Microsoft Edge in a Hyper-V container to keep the browser isolated from the rest of the operating system. Microsoft has released extensions WDAG for Chrome and Firefox from last year.
"To fix this issue if you see one of the above error messages, you should restart your device", reports Microsoft.
Microsoft plans to fix the bug in an upcoming version of Windows 10, but has not indicated when it will be released.