I'm trying to quiet down my PC. The primary hard drive is a loud maxtor, and the secondary is a quiet Samsung Spinpoint F1. I use it as a Windows Media Center, so it's on all night, but usually - even when in use - the primary drive hardly gets used. Until about 5am when I get woken up by constant hard disc access. It's not recording TV, it should be doing nothing - so what is it doing? How do I stop it?