Receiving an error message when attempting to open Windows Defender Application Guard (WDAG) or Windows Sandbox - Microsoft Support

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Windows 10 Pro, version 1903 Windows 10 Enterprise, version 1903 Windows 10 Pro, version 1909 Windows 10 Enterprise, version 1909 Windows 10 Pro, version 2004 Windows 10 Enterprise, version 2004 More...Less

Symptom summary

Windows Defender Application Guard (WDAG) or Windows Sandbox might fail to open with the error, "ERROR_VSMB_SAVED_STATE_FILE_NOT_FOUND (0xC0370400)" or "E_PATHNOTFOUND (0x80070003)".

Workaround

To mitigate this issue after receiving one of the above error messages, you will need to restart your device.

Next Steps

Microsoft is working on a resolution and will provide an update in an upcoming release.

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