In the area of disk optimization, DiskMax is a tool to try. The application is able to scan and detect unnecessary files stored in your hard drive. The files are then removed which in turn frees up valuable disk space.
There are three scanning mode included in the application. Each one of them has a different scanning speed but all three are guaranteed to remove files that are left behind by uninstalled and non-existing applications. DiskMax is very rich and has the necessary resources to look for unnecessary files in every corner of your system.
DiskMax is very easy to use and understand. There is a help file included for novice users. The help file has lots of detailed explanation on how to run the application. This is definitely a great tool that is worth your time.