The Windows registry is a database repository for notification about a PCs configuration. The registry keep growing when you use Windows. As it does so, it attracts obsolete and unnecessary information, and gradually becomes cluttered and fragmented. With the growing of the registry, it can degrade the achievement of the whole system and cause a lot of weird software problems. XP Registry Cleaner scans the Windows registry and finds incorrect or obsolete notification in the registry. By fixing these obsolete notification in Windows registry, your system will run faster and error free. The backup/restore function of the instrument let you backup your whole Windows Registry so you can use it to restore the registry to the current status in case you encounter some system failure.