Insecure version of PHP on WP


New to WP. I am running into an insecure version of PHP 7.1.29 (Does not support 64bit values) in Tools>Site Health>Info>Server. My IIS 10.0 on Windows 2019 Server, I run the Web Installer and it shows that 7.4 x86 and x64 versions are installed. I also use phpMyadmin to connect to my database and it is also showing PHP Version 7.1.29.

So, my question is, how do i get WP to use 7.4 since it is already installed and why is it saying the current version doesn’t support 64bit values?

Thank you,

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