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

Last Modified

Thu Feb 24 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 can show the VM that is causing the error
  3. Right-click Virtual Machine > Settings > Management tab > Integration services
  4. Disable Backup (volume snapshot) Service
  5. 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 could be reset
      • To run the backup with this option enabled, check eventlog on the Hyper-V host - it will contain warnings/errors pointing to the particular machine causing the issue
      • You will need to check the eventlog inside of VM(s) specified and implement corresponding fix to resolve the issue
  6. If the issue persists modify the config.ini located in C:\Program Files\Backup Manager by default. Add the following lines to the bottom:


  7. Save the config.ini file
  8. Restart the Backup Service Controller Service for changes to take effect