Clive,
my big brother reckons this is the best Defrag software on the market
Diskeeper I'm using version 7.0410.1 which you set and forget, it defrags automatically as and when it is needed dependent on what you set it at.
Here's what came up when I opened the programe manually just now.
Findings on C:
Diskeeper has completed analysis of this volume and found 34 fragmented files and/or directories and 75 excess fragments.
The average number of fragments per file is 1.00.
On average, you have 0% excess fragments per file on this volume. This is a slightly fragmented volume. You should schedule Diskeeper to run at least once a day (if you haven't already done so) to keep fragmentation at a low level. I sometimes see a little icon in the tool bar that means it is defraging, but it is only on for seconds, seen it about twice in 10 days.
You can dowload the freeware version which does what mine does. And although it explains all functions avaliable, it does not allow you to enable the 'set and forget option' Download the free one but don't rush out and buy the full blown one just yet, nod nod