Problem

[tehtank]

Hey guys, I got a question about my computer. I built it about a year and a half ago, and ever since I built it, randomly, there would be loudish click in my computer(not sure where it's coming from, since it happens so randomly and not very often that I don't know when to listen for it, but I want to say it's the harddrive). The computer will then freeze up(won't be able to do anything, no mouse moving, no typing), and the process light will light up, and stay solid until I turn off the power.

It hasn't really ever bothered me, since it doesn't happen very often, but I was thinking I might get an easy answer about it here. =)

Thanks if you can help!