in a cmd window go to the folder where you are creating the project. Type g++ --version. If you get an answer, your compiler is working from there and you have to back into CB and see if that G++ is working in the CB bin directory. If one of these is working you have to go into settings/compiler and maybe reinstall the compiler you want to use. If you are updating the compiler, you will want to install from the minGW folder that you downloaded. Not that easy to do. See my forum post on this.
maxcy