I just downloaded Apple iTunes 10.4.1 from this site. Unfortunately, it's a file format that my computer and I are both sorely confused about: .php

I double-click the file (which took a good 2 hours to download, mind you, so I'm certain SOMETHING is in that file) and I get an error message. Before doing loads of time-consuming research, I've decided to come to the source.

Can anyone help me out? I'm brand-spankin-new to this, so go easy on me if this is a stupid question...

Thanks~