With so many different registries with different views, the exact status of some breeds is hard to define. (messybeast.com)
There are so many different registry entries that could be present from so many different software programs that the average registry cleaner put together by a less - than - reputable software company can't possibly account for them all. (howtogeek.com)
In the past Macecraft Software has published four different comparison studies that attempted to answer questions about the quality of different registry cleaning products. (macecraft.com)