I used a program called Resource Hacker, opened shell32dll.mui file with it and edited the values inside the "dialog" folder, first open the dialog folder and then you will see various numbers, each of these numbers correspond to a dialog box of windows, you will see something like : FONT 9, "Segoe UI" . Just edit to a value you want, in this case the number 9 is the font size, and segoe ui is the font face that is currently being used. Change it to whatever you want and click on "compile script". When you finished , save the file and you're done.