jv16 PowerTools 2009
Very good
Full user review
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"Appears great but actually damages your system"
Pros
Many system tools in a single window.
Cons
After using this product a few times, programs begin to malfunction, crash or not work. If you use it to clean Windows settings as well, your entire system begins to malfunction and you have to reinstall Windows and all your programs from scratch.
Summary
Don't ever use any registry cleaners. They all damage your system. There are many articles on the web warning against them. Like driver updaters, they are the snake oil of computer software.