I was going to install a new copy of El Capitan via my USB drive, but it turns out it's dead, it's been corrupted. I erased everything before that, so I'm stuck with the installation screen.
How can I download a new copy of El Capitan? As you know, Safari comes preinstalled. I also have a Windows computer, so I'm open to suggestions.
Here's my Macbook Air Model: MacBook Air "Core i5" 1.4 13" (Early 2014)