I am using FastCGI to setup PHP. I've followed the instructions on the iis.net website. I added the handler mapping, edited the php.ini file as specified. None of it works, I just get a 404.0 error saying "The page you are looking for has been removed", even though the physical path displayed on the error page exists. After trying this manual method (unzipping php, manually adding handle mapping, etc), I removed everything and I tried the Web Platform Installer (ugh) but I still have the same issue.

A little more information:  

The Detailed Error page says the handler is my StaticFile handler (not PHP FastCGI). It also gives error code 0x80070002

When I look at the logs, it shows "GET /php.ini" as giving the 404 error. Why is IIS looking for that?