| Event Id | 12321 |
| Source | Microsoft-Windows-Hyper-V-Worker |
| Description | Error '%4' (%5) while opening file '%3' during serial device startup. |
| Event Information | According to Microsoft : Cause This event is logged when opening file during serial device startup. Resolution Restart virtual machine Try restarting the virtual machine. Verify The virtual machine is able to start successfully. |
| Reference Links | Event ID 12321 from Source Microsoft-Windows-Hyper-V-Worker |
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