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
The Frustrating Reality of RegBack Copy Not Working: A Troubleshooting Guide regback copy not working
The Proactive Fix Alex Implemented Later: If you are trying to fix a corrupted
HKLM\System\CurrentControlSet\Control\Session Manager\Configuration Manager
DWORD: EnablePeriodicBackup = 1