There comes a time in every once-new computer's life when it just doesn't feel fresh anymore. You know, when it's taking 5-10 minutes to boot up into Windows, the fans are making funny squealing noises, and there's a wad of orange cat hair protruding from the rear fan grille. It's the computer equivalent of senility, your once precious box has lost its edge.Time for action. Let's take a quick look at some of the most common hardware and software problems related to constant use, and find some quick solutions.