Double-click it and set the Value data to 1 .
The Windows Registry is the central database that stores low-level settings for the operating system and installed applications. A corrupted registry can lead to blue screens, application crashes, boot failures, and system instability. That is why Windows includes a built-in feature called (Registry Backup), which automatically creates copies of registry hives (SAM, SECURITY, SOFTWARE, SYSTEM, DEFAULT) in the C:\Windows\System32\config\RegBack folder. regback copy not working
Choose a restore point dated before the problem began. Double-click it and set the Value data to 1
Type rstrui in Run → Next.
Complete the restore and reboot.
Press Win + R , type regedit , and press Enter. and press Enter.