In anycase, registry cleaning won't do a darned thing for you except possibly make matters worse.
I disagree with this. CCleaner has over 400 million downloads. I've used it for years, including the registry scanner, and never had a problem with it. Granted, many users will not notice any difference in computer performance by running CCleaner's registry scanner because their registry is not terribly cluttered with hundreds of obsolete entries accumulated over years of use. But, there are such users who fit the latter description and they can benefit from registry cleaning and CCleaner is a very safe cleaner to use.
And, I've seen cases where running CCleaner's registry scanner can fix problems. I recall one case where the user had removed an older version of MS Office and was trying to install a newer version but the installation would not properly execute. Running CCleaner registry cleaner was suggested. He did that and then had no problem installing Office.
It's unfortunate that some members of this forum repeatedly, flatly say the no registry cleaner should ever be used. I would agree that many of them should be avoided but to just make a blanket statement that none of them should ever be used is not the best advice to be perpetuating, and it's unfair to the developers of an excellent product such as CCleaner.