You need to install either MinGW or Visual Studio 2017/2019/2022 and the C++ Development tools, and set the appropriate configuration variables in the config.winnt.txt file located in the Cerberus/bin directory. Replace the one in that directory with
this one; it has information included in the file. Once you have the the compiler installed and the config.winnt.txt file set up correctly, then you need to restart the Cerberus IDE.