I have a Dell Vostro 200. It has a hatachi 80 GB harddrive. It has no OS installed. I want to switch it with a 1TB hard Drive. 1st does it matter who the manufacter is? Dell wants WD. I want Seagate. And do I just load the XP Pro disc in and start? Oh, I don't believe it has ever been used. It was supposed to be a vista...yuck!