Event ID 10021 — Virtual Machine Start Operation

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Applies To: Windows Server 2008

This is preliminary documentation and subject to change.

Virtual Machine Start Operation

Event Details

Product: Windows Operating System
ID: 10021
Source: Microsoft-Windows-Hyper-V-VMMS
Version: 6.0
Symbolic Name: MSVM_VMMS_VM_SID_ADD_MAPPING_WARNING_SUMMARY
Message: Failed to create security identifier mapping from '%5' to %6.

Resolve

Reimage server

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.

Verify

The virtual machine is able to start successfully.

Virtual Machine Start Operation

Hyper-V