Free Registry Cleaner is Registry-cleaning software. It will safely clean and repair Windows Registry problems with a few clicks and enable you to enjoy a cleaner and more efficient PC. The Registry is the nerve center of your PC, and problems with the Windows Registry are a common cause of Windows crashes and error messages. Free Registry Cleaner also finding and removing common junk files that accumulate over time. It comes pre-configured with 22 types of file extension that can usually be considered disposable, and you can extend the range by adding your own file types.