I bought the product CCleaner Pro in 2013 and till now its functioning and performing well without any hesitation.
The best part of the application is it uses minimal resources and no compatibility issues! Till now I think CCleaner is the best junk cleaner in the market.
It auto starts when you start your Operating System(Windows), and monitoring cookies, junk Internet files, invalid registry paths, and many more functionalities. When it runs in background it won’t hang your system . There are several tabs in the application like
1)Cleaner: There are 2parts in the cleaner category i.e windows, applicaton. You can manually choose what to clean but the application sets a default selection works well.
2)Registry: Here you can search and delete invalid registries from your Operating system.
3)Tools: There are several features in tools category but I like Uninstall, start-up, duplicate finders. In uninstall part is different from procedural ways, i.e sometimes a program uninstall from your system but the entry still exist in the list . we can use the ccleaner uninstall process to uninstall as well as delete the entries from system. In start-up tool we can stop unwanted programs when windows starts. In duplicate finders we can wipeout multiple same entries in the O.S.
Finally I recommend this Program for every users to use .