To continue with the car analogy, computer problems can be as sudden and acute as your car dying at a stoplight, or not starting in the garage. It’s more likely that computer failure symptoms are like your tires. New tires are responsive and reassuring, but over time, the driver will stop noticing. The miles add up, the tread wears off. Being out of balance can create additional wear patterns. The next thing you know, you are sliding all over the road in a rain or snowstorm. Modern cars have tire pressure warnings, but they can’t alert you to tread problems. The condition of your tires is just one more thing you have to pay attention to if you drive a car. The performance of your computers is also something you have to pay attention to if they are important to your productivity.