I bought one to hook into my home network.

The one thing I did right away was add 512 meg of memory, it was really
slow without it.
Other than that I have no complaints. It is a very quiet machine,
compared to my other three computers.

The only other things I did was go through and turn off a bunch of
services that it had running and a couple of programs it had staring.
That plus let Adware and Spybot do their thing.