Hi all, I'm about to install Windows Vista x64 on a computer which had XP previously installed on it. Only problem is that when I put the Vista CD in, go through the install process and come up to the formatting bit, it won't let me. How can I simply format the whole hard drive? It used to be so easy to boot into dos and do it from there. Sorry if the answer's blatantly infront of me but I could really use some help! Many thanks!