Hey, before i start, i just like to say: If this is the wrong section, then i'm sorry, because i don't know exactly where it should be.
Anyways, my brother installed Windows 7 recently on the computer, and i don't want it. And i don't want it. And i can't format the computer because i've lost the discs for formatting. So i tried installing XP from ubuntu using the software WineHQ (It let's me open .exe files). But when i press install button, it gives me this error:

I've made a partition of my HDD, there are three of them: Windows 7, XP And ubuntu. And the XP Installer is placed in the XP HDD. How do i fix this problem?