RegSeeker - registry search tool
RegSeeker is a handy tool for managing several popular registry items and searching the registry by keyword. It offers quick access to Startup Entries, Uninstall Information, Color Schemes, History items (URLs, Recent Documents etc) and IE Favorites. The program also includes a registry cleaning feature that finds invalid and unused registry entries, allowing you to delete them. RegSeeker can automatically create a backup before deleting any registry entries. The program comes with an attractive, easy to use interface. Nevertheless it is not intended for complete beginners and you should feel comfortable working with the Windows registry before using it.
ERUNT - registry backup tool
ERUNT (Emergency Recovery Utility NT) allows you to keep a complete backup of your registry and restore it when needed. The standard registry backup options that come with Windows back up most of the registry but not all of it. ERUNT however creates a complete backup set, including the Security hive and user related sections. ERUNT is easy to use and since it creates a full backup, there are no options or choices other than to select the location of the backup files. The backup set includes a small executable that will launch the registry restore if needed.