If you could name the most important component that is housed inside your computer what part do you think that would be? To be honest, there are lots of parts on your computer that are essential for the system to operate properly so maybe we should rephrase the question. What component of your computer is most likely to fail? This question will narrow down the results quite a bit and the answer might surprise you. Your hard drive is the correct answer not just for the last question but also for both questions.