If you want to go third party, most of the defraggers are decent, and
your final decision rests on what runs best on your system. I personally
chose Diskeeper because it was the fastest on my system(s) and was not a
resources glutton. It also seems to be the most troublefree to use i.e.
no nasty suprises, from what I have read on various forums.
I always recommend that you try before you buy, so you know what you
are getting. 'Diskeeper' (
http://www.diskeeper.com) has free trial
versions to try out; I'd try out the Pro version, and skip the Home
version, but your choice may be different depending upon your
requirement.
--
Benjamin