Regback Copy Not Working Patched May 2026

If you are trying to fix a corrupted Windows system and found that the "regback copy" command isn't working—specifically because the C:\Windows\System32\config\RegBack folder is empty or contains only 0 KB files—you are not alone. This is not a bug; it is a deliberate design change by Microsoft that has affected every version of Windows 10 and 11 since 2018. Why the RegBack Copy is Not Working

Historically, Windows automatically backed up the registry hives to the RegBack folder, allowing users to restore them via Command Prompt during a startup failure. However, starting with Windows 10 version 1803, Microsoft disabled this feature to reduce the "disk footprint" of the operating system.

While the folder and the scheduled task still exist, they no longer populate with data by default. If you are currently in the Windows Recovery Environment (WinRE) trying to copy these files to fix a "Blue Screen of Death" (BSOD), and they show as 0 KB, those files cannot be used to repair your system. How to Fix "RegBack Copy Not Working" for Future Use regback copy not working

If your computer is still functional and you want to ensure you have registry backups for the future, you must manually re-enable the feature through the Windows Registry. How to turn registry backup back on in Windows 10

Solution 2: Enable Legacy RegBack (Restore Old Behavior)

If you want the old automatic backup system (where actual, copyable files appear in RegBack), you can re-enable it via the Registry (ironic, we know). If you are trying to fix a corrupted

Warning: This disables the VSS optimization, using more disk space.

  1. Open regedit as Administrator.
  2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Configuration Manager
  3. Create a new DWORD (32-bit) value named EnablePeriodicBackup.
  4. Set its value to 1.
  5. Restart your computer.
  6. After restart, run the Task Scheduler: Go to Task Scheduler Library > Microsoft > Windows > Registry.
  7. Right-click RegIdleBackup and select Run.
  8. Check C:\Windows\System32\config\RegBack. You should now see files with actual sizes (not 0KB). You can now copy them normally.

Method 4: Check and Free Up Disk Space

Ensure your system drive (usually C:) has at least 2 GB of free space. Solution 2: Enable Legacy RegBack (Restore Old Behavior)

After freeing space, run the RegIdleBackup task again.

6. Antivirus or Security Software Interference

Some aggressive antivirus programs lock registry files and prevent read access for the backup process. This is especially common with real-time protection features.

Regback Copy Not Working: The Complete Guide to Fixing Windows Registry Backup Failures

5. Remediation and Solutions

Since the native regback functionality is disabled by default, administrators must implement alternative strategies.

3. Permission Issues on the RegBack Folder

The C:\Windows\System32\config\RegBack folder has strict NTFS permissions. If the TrustedInstaller or SYSTEM account does not have full control, or if a third-party antivirus has locked the folder, the backup cannot be written.

5.4 Boot from WinRE/WinPE and copy