I want to create a boot disk to reformat my hard drive. Windows will not let me reformat one of my drives becuase it has an operating system installed. I tried using my old xp disk but my computer doesnt recognize it as bootable any more.(Maybe becuase I'm running vista now. Also, I dont have the vista disk either). Can someone please give me a step by step of how to go about creating a disk that I can boot from to reformat a hard drive. Thanks.