In the same way dust or debris piles up around a house, so does it pile up in a computer. Sometimes it is not a big deal. But when dust starts clogging the tracks of doors, it is time to clean it out. The dust in your computer I refer to are the little logs and temporary items that your computer gets filled with after extended use. I use CCleaner to do it. It knows where to look for all this junky useless stuff. Also the application is straightforward and simple. It is a matter of clicking or unclicking what you want it to clean. Now most of this stuff could be done manually but this is a one stop application. It also includes help to get rid of software that does not want to be uninstalled. If you are not sure, go through the tour and if you like it give it a try!