Yes, it should be very clear. A blue screen will come up asking about how you want to partition your hard drive. You have to have at least one since your hard drive is brand new and there is nothing on it. But if you want more than one, just create more than one. It's very simple once you see it. It will ask you if you want to create a partition, then just tell it how much you want in each part and you're done. 10 gigs should be way more than enough space, and in fact if you have a lot of media you may want to reduce it to save space. I can't think of any reason as to why you'd ever need more than a gig or two for just windows stuff. Good luck, and if you have any other questions just let me know.