Okay, so my relative wanted to wipe an old Macbook Pro so that my Dad could use it, but said relative forgot to reinstall the OS. So, after much frustration, I have managed to get Windows running on the Macbook Pro (since I had an Installation Disk sitting around, I had to delete all the partitions and format the HD to get it installed) but I still can't get El Capitan onto the Mac even with a bootable USB that has the installer in it (It gets stuck with the Apple logo and a full progress bar when I try to boot the Macbook Pro from the EFI). Anyone can give me a step by step on how to partition it via Windows and install El Capitan from there? Help would really be appreciated. EDIT: My Macbook Pro is a 2009 model.