| Event Id | 12720 |
| Source | Microsoft-Windows-Hyper-V-Worker |
| Description | Cannot modify the numeric lock when the virtual machine is online. |
| Event Information | According 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 Links | Event ID 12720 from Source Microsoft-Windows-Hyper-V-Worker |
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