Windows Registry - Backups and Recovery

Backups and Recovery

Different editions of Windows have supported a number of different methods to back up and restore the registry over the years, some of which are now deprecated:

• System Restore can back up the registry and restore it as long as Windows is bootable, or from the Windows Recovery Environment starting with Windows Vista.
• NTBackup can back up the registry as part of the System State and restore it. Automated System Recovery in Windows XP can also restore the registry.
• On Windows NT-based systems, the Last Known Good Configuration option in startup menu relinks the HKLM\SYSTEM\CurrentControlSet key, which stores hardware and device driver information.
• Windows 98 and Windows Me include command line (Scanreg.exe) and GUI (Scanregw.exe) registry checker tools to check and fix the integrity of the registry, create up to five automatic regular backups by default and restore them manually or whenever corruption is detected. The registry checker tool backs up the registry, by default, to %Windir%\Sysbckup Scanreg.exe can also run from MS-DOS.
• The Windows 95 CD-ROM included an Emergency Recovery Utility (ERU.exe) and a Configuration Backup Tool (Cfgback.exe) to back up and restore the registry. Additionally Windows 95 backs up the registry to the files system.da0 and user.da0 on every successful boot.
• Windows NT 4.0 included RDISK.EXE, a utility to back up and restore the entire registry.
• The Windows 2000 Resource Kit contained an unsupported pair of utilities called Regback.exe and RegRest.exe for backup and recovery of the Registry.