Cove: Error: "VSS error 0x800423f4" during a backup of Hyper-V

Last Modified

Tue Nov 29 14:37 GMT 2022


  • Hyper-V backup fails with error: "VSS error 0x800423f4: The writer experienced a non-transient error. If the backup process is retried, the error is likely to reoccur."


  • Cove Data Protection (Cove)


  1. Open Hyper-V Manager
  2. Open Hyper-V host and select virtual machine causing error

    The file path on the backup session error will show the Virtual Machine that is causing the error

  3. Right-click Virtual Machine
  4. Open the Settings
  5. Navigate to the Management tab, then click into Integration services
  6. Disable Backup (volume snapshot) Service
  7. Click OK
    • The machine will be in 'saved' state for a short period of time when you're not using 'Backup (volume checkpoint)' option and the uptime counter can be reset
      • You will need to check the eventlog inside of VM(s) specified in the error and implement the relevant fix to resolve the issue
  8. If the issue persists modify the config.ini to add the following to the bottom:

    The default location of the config.ini file can be found here

  9. Save the config.ini file
  10. Restart the Backup Service Controller Service for changes to take effect