hi i want to install windows 7 x64 pro from my usb stick the setup starts i select country keyboard etc when i have to partition the hdd i get a error "windows can't create a system partition or find a existent system partition" not sure if this is the actual message because my win is in another language and i made a translation from the original message. i can create partions manually format etc but when i press next that's the error i get the computer is new it only has a 500gb sata hdd no cdrom or other device any ideas ?