My BootCamp is not working

Hello Apple community,

I would like to report this issue I am having a on my Late 2009 imac using the El Capitan mac OS system. I recently am trying to attempt to download windows with no success. The problems I had involved 1. When initiating the download it would say " disc not found " even though it is not required on El Capitan. 2. when inserting a usb with iso downloaded in it the computer would download the support software and automatically quit with no prior warning. But when doing the exact same thing again progress would stop at 80% and nothing else. 3. When inserting the usb/disc with the windows iso inside it nothing happens and no indication of installing the actual OS is found.

Below is attempt results and picture so you can get a better understanding: