SNAPSHOT_FAILURE - Hyper-V VSS Writer Unstable State | Backup Rescheduling Required

SNAPSHOT_FAILURE - Hyper-V VSS Writer in Unstable State, Backup Rescheduling Required

KB ID: 104064
Cause:
Encountering a snapshot failure with error code 0x80042301, indicating that the Hyper-V VSS Writer is not in a stable state during the backup process.
Solution:
To resolve this issue, follow these steps:
1. Check the writers status by executing the command "vssadmin list writers" in the command prompt.
2. If the writers are not in a stable state, restart the VSS (Volume Shadow Copy Service).
3. Restart the Hyper-V VMM (Virtual Machine Manager) services.
4. If the above solutions do not resolve the issue, consider restarting the affected machine, as it may rectify the problem.
Note: After implementing the above solutions, reschedule the backup to ensure its successful completion without encountering the SNAPSHOT_FAILURE error.

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