Popular software for my PC
In order to work optimally, Windows must be maintained at least once a month, and if you are the type of user who installs and tests program after program, it is good to clean your hard drive at least once a week. I use mostly CNET for downloads, but also i have found good programs on similar sites for memory management, to deal with network identity and various settings, to chat pretty fast with co-workers or to manage the keypad on computer.
Personally, although I care a lot about organizing albums and songs by category (also valid for photos), I was surprised to discover hundreds of duplicate files that took up a few GB in vain.