I think i found a fix, not tested yet but if you open the setup for the version of visual studio that ue4 is using and click on modify you should be able to find an option ti install c++ stuff. This is probably the thing missing 
I think i found a fix, not tested yet but if you open the setup for the version of visual studio that ue4 is using and click on modify you should be able to find an option ti install c++ stuff. This is probably the thing missing