Short description of Registry Fix It! 4.0.2: Registry Fix It! v4.0.1 is an advanced registry cleaner for Windows that allows you to safely scan, clean, and repair registry problems with a few simple mouse clicks. Problems with the Windows Registry are a common cause of Windows crashes and error messages. By using PC tune-up utilities such as registry cleaners regularly, your system will be more stable, your software will run quicker, and your operating system will boot faster.