RegHunter gives you the option to create a registry backup. You can also restore the registry from a backup in the event that you wish to revert to a previous registry configuration.
To access the Backup section, just click on "Backups" in the RegHunter menu (1). The "System Backup" menu displays a list (2) of full registry backups that were previously made by RegHunter. Windows System Restore Points are also displayed in this section. To revert your PC to an earlier backup state, select a registry backup (or Windows System Restore Point), and click the “Restore Selected” button (3).
RegHunter allows you to create a new registry backup or Windows System Restore point at any time by clicking the "Create Registry Backup" button (7) or the "Create Restore Point" button (8). If you wish to delete a registry backup or Windows System Restore Point (not recommended), select the item and click the “Delete Selected” button (4).