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Windows Backup Failed Error 0x81000019 — Shadow Copy Creation Error

Errorsystem

Overview

Fix Windows Backup error 0x81000019 when backup fails because a shadow copy (VSS snapshot) cannot be created for the selected volumes.

Key Details

  • Error 0x81000019 indicates Windows Backup cannot create a Volume Shadow Copy (VSS) for the backup
  • VSS creates a point-in-time snapshot allowing backup of files that are currently open or in use
  • The shadow copy process requires sufficient free disk space (typically 10-15% of the volume)
  • Multiple VSS providers (Windows built-in, third-party backup software) can conflict
  • System Protection (restore points) and Windows Backup both use the VSS service

Common Causes

  • Insufficient disk space for VSS to create the shadow copy snapshot
  • Third-party backup or disk management software conflicting with Windows VSS provider
  • VSS service (Volume Shadow Copy) is stopped, disabled, or in an error state
  • Corrupted VSS writers preventing the snapshot from being created

Steps

  1. 1Free up disk space: ensure at least 15% free space on all volumes being backed up
  2. 2Restart VSS service: services.msc > Volume Shadow Copy > right-click > Restart
  3. 3Reset VSS writers: open admin Command Prompt, run 'vssadmin list writers' and check for failed writers
  4. 4Delete old shadow copies: run 'vssadmin delete shadows /all' then retry the backup
  5. 5Disable third-party backup software temporarily to check for VSS provider conflicts

Tags

backupvssshadow-copy0x81000019windows-backup

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Frequently Asked Questions

VSS (Volume Shadow Copy Service) creates point-in-time snapshots of disk volumes. This allows backup software to copy files that are currently open or being modified by capturing a consistent snapshot of the entire volume.