The FastCGI process exited unexpectedly
I am trying to run PHP via FastCGI on a Windows 2008 server.
I followed this installation doc http://learn.iis.net/page.aspx/246/using-fastcgi-to-host-php-applications-on-iis7/ and have checked I completed the steps correclty numerous times.
However when I try to execute a php page i am presented with the following error:
HTTP Error 500.0 - Internal Server Error C:\PHP\php-cgi.exe - The FastCGI process exited unexpectedly
Answer
maybe you should try installing VC++ runtime as explained here.
There's a fairly good chance you're missing the correct VC++ runtime for the version of PHP you're running.
If you're running PHP 5.5.x you need to ensure the VC++11 runtime is installed:
http://www.microsoft.com/en-us/download/details.aspx?id=30679
Make sure you download and install the x86 version (vcredist_x86.exe), PHP on Windows isn't 64 bit yet.
If you're running PHP 5.4.x then you need to install the VC++9 runtime:
http://www.microsoft.com/en-us/download/details.aspx?id=5582