CleanReg is a housekeeping tool used to remove invalid file references from the Windows registry. It is fast and the most thorough. CleanReg has a single-click cleanup button. Just start the program to complete the registry scan. You can easily delete any file references or registry keys, or move them to a hidden list so they won't show up in subsequent scans. An Undo file allows you to effect a quick restore if you encounter any problems. It is not designed for the novice, as you need to understand what the program is deleting and how to put it back. Without the single click, it presents the information for the user to make the decision. Only with registration is the Undo function enabled, so be sure to back up your registry by other means.