I find it helpful to clean up wasted hard drive space in one swoop. Its a holdover from my time as a windows user. I actually had to help my roommate out, his computer is just filled with bs programs that downloaded on to his system and installed on there own. I had no idea windows had become such a nightmare in regards to just scammy programs, apps and toolbars that do nothing.
Anyway, his comp runs like new after using ccleaner and avast