i just got my macbook which is 1.5ghz with 1gb ram... when i switched it on it runs windows xp professional and does not give me any choice to select the os. i have been told that the previous owner has installed xp onto it and i dont know if it has mac os aswell for dual boot. i can only see the partition C in my computer. I do not have the disks etc with me. I only want the mac os and do not want windows xp on my macbook but i cant seem to figure out how to get mac os back on it and how to get rid of xp... any help will be appreciated