Maintaining a computer properly is important to prevent issues like a slow hard disk, monitor malfunctions, and sticky keyboards. Just like maintaining a car, computers require regular cleaning and ensuring all components are running correctly. Cables especially need managing to avoid communication problems between peripherals. Dust buildup can also cause overheating and malfunctions, so computers in dusty environments may need cleaning more often. Regular maintenance of hardware like keyboards and mice through cleaning every 3-6 months can prevent expensive repairs.