Event ID 10021 — Virtual Machine Start Operation
Applies To: Windows Server 2008
This is preliminary documentation and subject to change.
Virtual Machine Start Operation
|Product:||Windows Operating System|
|Message:||Failed to create security identifier mapping from '%5' to %6.|
A possible security compromise has been created. Completely reimage the server (sometimes called a bare metal restoration), install a new operating system, and enable the Hyper-V role.
The virtual machine is able to start successfully.