Thanks Tootech, Just a bit of a new situation for me as when you buy a new machine from a shop it comes with OS and licence, when you build it you have to sort this out for yourself, this will be the first time that I have had two home built machines, and while I was working out how many penny's I need to save up. I thought do I really need to pay for another OS, and the answer is yes if you want to connect to the internet.
Thanks for the link it may be really useful, but now I have a dilemma on when Windows 7 is going to be released