I am using Toshiba Equium A200-1VO laptop and it is a very good laptop according to my requirements. I have formatted my whole laptop because of the viruses. After that when I installed the Windows xp in my laptop. after installing the windows xp in my laptop I was able to use it properly but after two days of installing the windows xp I am getting one problem. Now whenever I start the laptop after that at windows xp boot screen it gives me message like there is no hard drive please tell me what should I do?