This post describing the steps Configure IIS Server to Run PHP and Install PHP
1. Configure IIS to Made your System Server.
Enabling FastCGI support in IIS
FastCGI module is disabled in default installation of IIS. The steps to enable it differ based on the version of Windows being used.
To enable FastCGI support on Windows Vista SP1 and Windows 7:
1.In the Windows Start Menu choose "Run:", type "optionalfeatures.exe" and click "Ok";
2.In the "Windows Features" dialog expand "Internet Information Services", "World Wide Web Services", "Application Development Features" and then enable the "CGI" checkbox;

3.Click OK and wait until the installation is complete.