Cheers Iggy and thanks for your 2 cents, although what I should have said was I know that Windows defrag is usually set to run in the background by default, although I and a million others will have disabled that but those that haven't will be running it in the background whilst creating files merrily all day without another thought for it, so do you think that it's a complete waste of time to have it running and will it cause any problems? As you said I do only ever run it when I am not using this thing but a lot of people will not!!
P.S. Can you keep adding your 2 cents until I get a few dollars worth?? We brits need the cash you know, cheers!!!