Guys, i wrote my other post worng. I meant to say that when i want to install Windows XP Its show me this:

I really dont like Windows Vista. And i want to delete it. But my brother said that if i will format Windows Vista. i will not be able to install Windows XP Because my hard drive cant read it. He said i need to install driver or someting like that.
I tryed 2 disks of Windows XP And its show me the same thing.
Please help me!