I am very happy with your product.CCleaner Improves my PC health as a new PC.But you should add an important feature-"BACK-UP" in case anything deletes accidently.I had used RegSupreme-a registry cleaner software,it provides feature of "BACK-UP".You should add this functionality in CCleaner.
CC does have a registry backup facility. It rather defeats the object to backup anything else being cleaned.