I am trying to bootcamp my macbook pro with retina display. I go to run the bootcamp application and I go through the steps. I am downloading the Windows support software and the error message comes up "The Windows support software could not be saved to the selected folder." I have Windows 7 on a USB and I am trying to put the Windows support software on a different USB but it always comes up with this error. I have tried several times now. Please help I am going crazy!