Event ID - 12720

Event Id12720
SourceMicrosoft-Windows-Hyper-V-Worker
DescriptionCannot modify the numeric lock when the virtual machine is online.
Event InformationAccording to Microsoft :
Cause
This event is logged when Cannot modify the numeric lock when the virtual machine is online.
Resolution
Turn Off virtual machine
Turn Off the the virtual machine, then apply the changes.
Verify
The virtual machine is able to start up successfully with the desired BIOS settings applied.
Reference LinksEvent ID 12720 from Source Microsoft-Windows-Hyper-V-Worker

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