Hi. I never owned a PC but often surf the net for invaluable information using friends' PCs. I am completely ignorant of computers. I don't know a server from a flash drive. Anyway, I finally have decided to buy a PC but I am confused about whether I should get a notebook (laptop) or a netbook. What is the difference? I think the netbook can't play or burn DVDs but what other differences? I know the memory is low so is there a way to increase memory at a later date? Thanks.