Depending on your system configuration, there could be a number of reasons
for hard drive activity. You have already eliminated some of these reasons.
Others could be background scanning by Defender and/or your anti-virus (you
DO have one, don't you? If not, then this activity could be caused by malware
on your system) - you need to check the settings for these. Another
possibility could be caused by the amount of RAM in your system - less RAM
means more use of the Page File and hence more disk access.
> I'm running a new PC with Vista 32 and I'm wondering what sort of processes
> are running in the background that account for the hard drive to always be
> writing something. I have the Updater and Background Download service shut
> off... and it's not defragging. I've disabled the Index Service... though
> I've read that it will keep turning itself back on.
> Any ideas?