Intel C++ Compiler not installing into Visual Studio

Hi,

I installed the Intel C++ Compiler (and Threading Building Blocks) via the System Studio installation but when I open a solution in Visual Studio 2019 (16.5.1) Intel C++ Compiler is not listed in the "Platform Toolset" field of the project properties dialog, nor is Intel Compilers and Tools or anything similar listed after going to Tools > Options.

Does anyone know why it's not installing correctly into Visual Studio?

Thanks,

HC