CCleaner is less than 3MB and a freeware privacy and cleaning software. It deletes all the unnecessary and unused files from your computer safely and frees considerable hard disk space from your computer. It cleans the temporary files from you IE, Firefox, Chrome, Opera, Safari and also some locations on your computer like the Recycle bin. It also supports cleaning some third party applications and is integrated with a fully featured registry cleaner. CCleaner has topped the Popular Downloads list of Filehippo.
You can download CCleaner from their website or from the filehippo which is my favorite.
Post your reviews on it.