NT Server- Hard Drive Thrashing

I walked into a new office and they informed me that 3 weeks ago thier NT Server sounds like the hard drive just keeps spinning. There doesn’t seem to be anything on it. They are only sharing a 1mb database. This server was used 2 years ago and then retired to a workstation. I want to optimize it again and use it for much more but am unsure where to start. They are 2 hours away so I am trying to research where to start before I go there. Any ideas?