7 day free trial of Registry Purify. Analyze and clean invalid entries in Windows registry, backup and restore entire registry in system file level, compact registry to gain efficiency. It uses robust analyzing algorithm to scan your entire Windows registry for any invalid entries and provides you with a list of all registry errors found, you can then choose to selectively clean each item or automatically repair them all. Trial version is full-function but time-limited, you can use full function Registry Purify only during trial period. Windows Vista / XP / 2003 / 2000 / NT.