In my Student Edition of 2015 SW, the Equation function doesn't work. Equation Manager can accept entries, but no equation is created when OK is pressed, or it might give the error message "syntax error" even though the equation is exactly the same as one that works on another installation of SW. Also, Tutorials don't work, and the little balloons that tell what a button does don't work. I thought these were installation errors, and tried the Repair function on my disk, without any change. Is there a setting somewhere that I'm missing? Faulty installation disk?