So this was what I was doing. I created a partition in my window vista to install xp. So I restarted my laptop and put in the window xp disk. It went through to the part where I pick the partition, but the new one was not there so I quit the setup. When I try to start up my computer it would just show the logo, then a black screen after with the blinking underscore just like when it would boot disk. It would just stay there. When I try to reformat it to Window XP, it does not work either. My laptop is HP Pavilion.