Dust can make the chips inside your computer run hotter and also clog cooling vents.   At least once a year, unplug your computer, open the case, and blow out the dust. Do not wipe it with a rag; use either your breath or an aerosol can of compressed air.   Your mouse and keyboard [...]

You have lots of reasons to keep the files on your hard disk organized.   First, it makes it easier to do “housecleaning” — deleting files you no longer need.   Second, keeping data files in their own well-labeled folders reduces the risk that you will inadvertently delete an important program or data file.   [...]