Boot camp doesn't have the 3rd option to great windows 8 or later install disk.

So I wanted to install windows using BootCamp so I could duel boot windows because I still like OS X just it doesn't deal with games that well. So I downloaded the windows 10 ISO file and began the Boot Camp process, first thing I noticed was that in the tutorial I was watching had 3 (create a windows install disk, download the latest windows support software from apple, and install windows 8 or later versions.) options instead of 2. ( download the latest windows support software from apple, and install windows 8 or later versions.) which was what I had to choose from.

and I found after downloading and installing, boot camp asked for me to insert a Windows Install Disk, instead of just using the ISO file.

I managed to find this: https://www.youtube.com/watch?v=hE8If6gabUI

Its shows you how to make your computer compatible with making a USB install disk...

I tried it but I couldn't do it because I didn't have the permissions to change an application folder...

I checked if I was an administrator on my computer and I am. I even tried the "Sharing and Permissions" thing in the file info but it said I didn't have permissions for that either.

anybody know how to help?