If you receive File in Use. The action can't be completed because the file is open in another program even if file is closed in another program, see this.

Open the php.ini file in a text editor like TextPad (not in Notepad) and change the values for memory_limit. By default you should see memory_limit = 8M. Try changing it to 12M. If it doesn’t ...

Here's a quick tutorial on how to setup Nginx with PHP support. The key? The installation of fastCGI, aka PHP-FPM, so Nginx can serve PHP files to clients.

The absolute best way is to go into your php.ini file and set allow_url_fopen and allow_url_include to off. They should be off by default if you keep your server updated, but check anyway.