Fix – PHP Fastcgi Error Number 14001 (0x800736b1)


As you are installing PHP with Fastcgi in your Windows server, you may come along with Fastcgi Error Number 14001 (0x800736b1). Detail error as below:-

FastCGI Error

The FastCGI Handler was unable to process the request.

Error Details:

Error Number: 14001 (0x800736b1).
Error Description: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.
HTTP Error 500 – Server Error.
Internet Information Services (IIS)


This is due the PHP needed Microsoft Visual C++ to run and you had not installed it in the server. The solution would you will have to install the corresponding Visual C++ according to the PHP version that you use:-

PHP 5.3, 5.4 – Visual C++ 9.0 (Visual Studio 2008 or Visual C++ 2008)

PHP 5.5 or 5.6 – Visual C++ 11.0 (Visual Studio 2012)

PHP 7.0+ – Visual C++ 14.0 (Visual Studio 2015)