The most common mistake when trying to restore from a RegBack folder is attempting to do it while Windows is running. Because the active registry hives in the C:\Windows\System32\config folder are constantly in use, you will always get an "Access Denied" error. The only correct way to do this is from outside your main Windows installation.
RegBack Copy Not Working: Fix Windows Registry Backup Issues
If you cannot boot, you can check if Windows created a backup via the RegIdleBackup scheduled task, which is different from the traditional RegBack . Open Command Prompt in Recovery Mode. Navigate to C:\Windows\System32\config\ .
Check the comments below for community-driven solutions, or consult Microsoft's official documentation on the RegIdleBackup task. Your system's stability depends on a healthy, regularly backed-up registry. regback copy not working
Boot your computer into the . (Usually happens automatically after two failed boots, or by holding Shift while clicking Restart ).
Can you currently , or are you stuck on a blue/black screen ? Do you know if you have any System Restore points saved?
He pulled the logs—fragmented, timestamped, and terse. The first failure was at 02:03: permission denied. At 02:05, "destination full." At 02:09, "no such file or directory." The machine offered a litany of small betrayals; together they painted a worrying picture. The most common mistake when trying to restore
The RegBack folder still exists in your directory tree, but the files inside ( DEFAULT , SAM , SECURITY , SOFTWARE , SYSTEM ) are now placeholders with a file size of 0 KB.
Starting with Windows 10 version 1803, Microsoft by design. While the folder C:\Windows\System32\config\RegBack still exists, the files inside are kept at 0 KB to reduce the overall disk footprint of the operating system.
Press Win + R , type regedit , and press Enter. RegBack Copy Not Working: Fix Windows Registry Backup
The RegIdleBackup task requires free disk space. If your system drive has less than 1.5 GB of free space, Windows may skip the backup process. This is a safety mechanism to prevent the system from running out of space.
Type "Create a restore point" in the search box, click it, and click Create .
Open Task Scheduler (type taskschd.msc in Run).
Fortunately, the solutions are straightforward. In most cases, simply setting EnablePeriodicBackup to 1 and manually running the RegIdleBackup task restores full functionality. If not, checking disk space, permissions, and task scheduler integrity will resolve the issue. And if all else fails, manual registry backups and third-party tools provide a reliable fallback.
