The system registry is no longer backed up to the RegBack folder starting in Windows 10 version 1803

Applies to: Windows 10, version 2004, all editionsWindows 10, version 1909, all editionsWindows 10 Enterprise 2019 LTSC


Starting in Windows 10, version 1803, Windows no longer automatically backs up the system registry to the RegBack folder. If you browse to to the \Windows\System32\config\RegBack folder in Windows Explorer, you will still see each registry hive, but each file is 0kb in size.

The Windows\System32\config\Regbak folder

More information

This change is by design, and is intended to help reduce the overall disk footprint size of Windows. To recover a system with a corrupt registry hive, Microsoft recommends that you use a system restore point.

If you have to use the legacy backup behavior, you can re-enable it by configuring the following registry entry, and then restarting the computer:

HKLM\System\CurrentControlSet\Control\Session Manager\Configuration Manager\EnablePeriodicBackup
Value: 1

Windows backs up the registry to the RegBack folder when the computer restarts, and creates a RegIdleBackup task to manage subsequent backups. Windows stores the task information in the Scheduled Task Library, in the Microsoft\Windows\Registry folder. The task has the following properties:

Properties for the RegIdleBackup task