For some reason the Windows install wants to load a driver for some hard drives and you may not actually have to load one but you may have to go to the scxreen for that. At the bottom of the screen that y6our at for selecting a drive to load the OS there is a button for load driver that you can select. Seagate may actually have a driver for that hard drive , I don't know it's been some time since I had a Seagate.
Tried that, Alls that showed there was the OS DVD and the /E Drive. Dont know.