Fixing "FastCgiModule is Not a Recognized Native Module" in IIS

Verify That FastCGI is Installed

1. Press Win + R, type inetmgr, and press Enter.
2. Click on "Server Manager" > "Manage" > "Add Roles and Features".
3. Scroll to "Web Server (IIS)" and click "Role Services".
4. Ensure "CGI" is checked under "Application Development".

If it is not installed, install it and restart IIS.

For closely related PHP runtime / web server topics, see Fix "PHP Version Does Not Meet Bitrix Requirements" and Fixing ERR_INVALID_RESPONSE in PHP.

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Install FastCGI via PowerShell (If Missing)

If FastCGI is not installed, add it via PowerShell:

Enable-WindowsOptionalFeature -Online -FeatureName IIS-CGI

Restart IIS

iisreset

Verify FastCGI is Enabled in IIS

1. Open IIS Manager.
2. Click "Handler Mappings" (at the server level).
3. Ensure "FastCgiModule" is listed.
4. If missing, click "Add Module Mapping" and configure:
   • Request Path: *.php
   • Module: FastCgiModule
   • Executable: C:\php\php-cgi.exe
   • Name: PHP via FastCGI
   • Click OK > Yes to confirm.

Restart IIS:

iisreset

Register FastCGI in IIS Manually

If FastCgiModule is still not recognized, manually add it in the IIS configuration.

Open Command Prompt (Admin)

Run:

cd %windir%\system32\inetsrv
appcmd add module /name:FastCgiModule /image:"C:\Windows\System32\inetsrv\iisfcgi.dll"

Restart IIS

iisreset

Summary of Fixes

Now FastCgiModule should work in IIS!