Registry Editor is an advanced tool for viewing and changing settings in your system registry, which contains information about how your computer runs. Almost the entire settings are stored in the registry. A careless change could cause irreversible damage to the computer. Hence, taking a backup of the registry before editing is Recommended.
Follow these steps to Backup Registry Editor:
CAUTION: Do not double-click the "Registry Backup" file on the desktop unless you intend to undo the changes you are making to the registry.
NOTE: This method is for Windows 95/98/Me, XP, Vista and Windows 7. It will not work for Windows NT/2000. Windows NT/2000 has additional security protection that prevents this backup from being restored.