| Event Id | 12721 |
| Source | Microsoft-Windows-Hyper-V-Worker |
| Description | Cannot modify the numeric lock. |
| Event Information | According to Microsoft : Cause This event is logged when Cannot modify the numeric lock. Resolution Turn Off virtual machine Turn Off the the virtual machine, then apply the changes.cannot change or send keys when the virtual machine is not running. Verify The virtual machine is able to start up successfully with the desired BIOS settings applied. |
| Reference Links | Event ID 12721 from Source Microsoft-Windows-Hyper-V-Worker |
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