The weird thing is I had the exact same problem and it was fixed after a reboot, resetting the text size, and running the codec tool. The only thing I did that I haven't suggested is that you try is reset the text zoom back to normal.
Control Panel-Appearance and Personalization-Display. Then select medium (make sure to reboot for the change to take effect).
Oh and remember to remove those flags for compatibility. Other then that I can't really suggest anything. I suspect it may be an issue within the code of the program.