It's not clear what you want, but I think you want to install Windows, no? Go to your BIOS boot menu and make sure your DVD drive (wherever your Windows disc is in) is set as the first boot device.
A little more info would be helpful, but I would pull out the manual for your motherboard to see how to enter the boot menu. If you don't have that, try to hit f-11 at boot up to bring up the boot menu (sometimes F10 or F8). pick your dvd or cd drive to boot first, then hit enter when prompted by windows setup.