Dear all, I am trying to run a code with my laptop where I installed the Wolfram Mathematica 12.0 student version. My laptop runs on windows 10 64bit. Unfortunately. I do not know what kind of Mathematica version (64/32) I have, since I had to download it from my university and there was only one option. I need to compile functions with C and therefore I tried to install a c compiler, but Mathematica does not see them. So far I tried various versions of MinGW and of course visual studio. Unfortunately Mathematica never recognizes the installations. (See below) I also tried to set up the path for the c compilers myself. However I am not sure, whether I chose the right path. I used the one shown above in my latest try. It helped a little bit. Now my error messages when using compilationtarget-> c is, that Mathematica can not generate a library. Still Mathematica does not find anything using CCompilers[Full] as seen above. So its far from perfect... I don't know how to fix this. I would really appreciate any kind of help.