There are a lot of products out there that claim to ‘clean’ your registry. Many of those same products will also infect your computer with malware designed to goad the user into purchasing a piece of software that alerted them to non-existent virus infections.
This geek recommends that you follow a review of products such as registry cleaners this site is only for reviews of legit registry cleaners. Major Kudos to the guys that put that site together. After 5 years in the field as a Road Runner level 4 support tech, you would not believe the amount of crapware registry cleaners I have come across.
Bottom Line? Be smart. Before you install any unknown software on your computer, see what other people are saying about it. That’s what reviews are for.