I have just bought Macbook Air 13inch with 128GB of SSD. Right now, I am trying to install with bootcamp assistant 6.0. When I first tried with Windows 7 64bit, it asked for 8 or later version. Then, I am now installing 8.1 pro with bootcamp. Then, the problem occur in that bootcamp can't detect missing installation file. However, if the installation file is installed on PC, it seemed to go well. Is there any way that I can install 8.1 pro?