| Event Id | 12666 |
| Source | Microsoft-Windows-Hyper-V-VMMS |
| Description | Cannot change the media. The media is currently locked by the guest operating system. |
| Event Information | According to Microsoft : Cause This event is logged when Cannot change the media. Resolution Ensure Device is not in use Ensure the device is not in use by another process and retry the operation. Verify The operation that lead to the failure now completes successfully. |
| Reference Links | Event ID 12666 from Source Microsoft-Windows-Hyper-V-VMMS |
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