I am trying to get windows 7 on a usb drive to install on a computer I'm building. This is all fresh install. I have the dvd to usb tool, ran it and it says the bootsect couldn't run. So I've been trying to track down how to make this work. I'm trying to download win 7 pro 64 bit. I've found the bootsect file and downloaded it and tried extracting it to the dvd usb tool and reinstalling to usb as one guide said and i still get the same result. Can I just copy and paste the bootsect into the boot file or is there some other method I'm missing? Please help. I downloaded the win 7 from digital river.