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.
Starting with Windows 10, version 1803, Microsoft made a controversial change: by default, the system stopped creating full, restorable registry backups. Instead, the RegBack folder would contain or would not be updated at all. This was intended to save disk space, but it left users without a built-in recovery method. Many users and IT professionals reported that "regback copy not working" because they found the files were empty or outdated by months.
To help narrow down the best solution for your system, let me know: What are you currently running? regback copy not working
Event Viewer → Windows Logs → System → Filter for source: Microsoft-Windows-Kernel-General or Registry .
For official troubleshooting steps and further details on registry management, you can visit Microsoft Support . Instead, the RegBack folder would contain or would
Note: Even after this change, you may still see 0 KB files until the task runs in the Task Scheduler . What to Do if RegBack is Already Empty
If you recently updated Windows, you might have a Windows.old folder. To help narrow down the best solution for
Choose a restore point dated before the problem began.