To celebrate 5 years of Iobit advanced systemcare pro they are giving it away free. If you like this sort of thing why not grab it, i`m not a fan of registry cleaners, don`t know much about the rest haven`t installed it yet.
Use at your own risk!
Check it out here
http://db.iobit.com/license-free/asc-free-license.php
p.s. You don`t even have to give any details (but you don`t get support)...